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| 1 | Band structure engineering in metal halide perovskite nanostructures for optoelectronic applications显示文摘Metal halide perovskite nanostructures have emerged as low-dimensional semiconductors of great significance in many fields such as photovoltaics,photonics,and optoelectronics.Extensive efforts on the controlled synthesis of perovskite nanostructures have been made towards potential device applications.The engineering of their band structures holds great promise in the rational tuning of the electronic and optical properties of perovskite nanostructures,which is one of the keys to achieving efficient and multifunctional optoelectronic devices.In this article,we summarize recent advances in band structure engineering of perovskite nanostructures.A survey of bandgap engineering of nanostructured perovskites is firstly presented from the aspects of dimensionality tailoring,compositional substitution,phase segregation and transition,as well as strain and pressure stimuli.The strategies of electronic doping are then reviewed,including defect-induced self-doping,inorganic or organic molecules-based chemical doping,and modification by metal ions or nanostructures.Based on the bandgap engineering and electronic doping,discussions on engineering energy band alignments in perovskite nanostructures are provided for building high-performance perovskite p-n junctions and heterostructures.At last,we provide our perspectives in engineering band structures of perovskite nanostructures towards future low-energy optoelectronics technologies. | Qingdong Ou Xiaozhi Bao Yinan Zhang Huaiyu Shao Guichuan Xing Xiangping Li Liyang Shao Qiaoliang Bao | 2019 | Nano Materials Science2019，1，4： | 5 |
| 2 | High-performance flexible perovskite photodetectors based on single-crystal-like two-dimensional Ruddlesden-Popper thin films显示文摘Two-dimensional Ruddlesden-Popper(2DRP)perovskites have attracted intense research interest for optoelectronic applications,due to their tunable optoelectronic properties and better environmental stability than their threedimensional counterparts.Furthermore,high-performance photodetectors based on single-crystal and polycrystalline thin-films 2DRP perovskites have shown great potential for practical application.However,the complex growth process of single-crystal membranes and uncontrollable phase distribution of polycrystalline films hinder the further development of 2DRP perovskites photodetectors.Herein,we report a series of high-performance photodetectors based on single-crystal-like phase-pure 2DRP perovskite films by designing a novel spacer source.Experimental and theoretical evidence demonstrates that phase-pure films substantially suppress defect states and ion migration.These highly sensitive photodetectors show I_(light)/I_(dark) ratio exceeding 3×10^(4),responsivities exceeding 16 A/W,and detectivities exceeding 3×10^(13) Jones,which are higher at least by 1 order than those of traditional mixed-phase thinfilms 2DRP devices(close to the reported single-crystal devices).More importantly,this strategy can significantly enhance the operational stability of optoelectronic devices and pave the way to large-area flexible productions. | Chao Liang Hao Gu Junmin Xia Tanghao Liu Shiliang Mei Nan Zhang Yonghua Chen Guichuan Xing | 2023 | Carbon Energy2023，5，2： | 4 |
| 3 | Long-Range Balanced Electron- and Hole-Transport Lengths in Organic-Inorganic CH3NH3PbI3显示文摘 | Guichuan Xing Nripan Mathews Shuangyong Sun Swee Sien Lim Yeng Ming Lam Michael Gr?tzel Subodh Mhaisalkar Tze Chien Sum | 2013 | 2013 (6156)2013，，6156： | 3 |
| 4 | CsPb(I_(x)Br_(1-x))_(3) solar cells显示文摘Owing to its nice performance, low cost, and simple solution-processing, organic-inorganic hybrid perovskite solar cell(PSC) becomes a promising candidate for next-generation high-efficiency solar cells.The power conversion efficiency(PCE) has boosted from 3.8% to 25.2% over the past ten years. Despite the rapid progress in PCE, the device stability is a key issue that impedes the commercialization of PSCs. Recently, all-inorganic cesium lead halide perovskites have attracted much attention due to their better stability compared with their organic-inorganic counterpart. In this progress report, we summarize the properties of CsPb(IxBr1-x)3 and their applications in solar cells. The current challenges and corresponding solutions are discussed. Finally, we share our perspectives on CsPb(IxBr1-x)3 solar cells and outline possible directions to further improve the device performance. | Xue Jia Chuantian Zuo Shuxia Tao Kuan Sun Yixin Zhao Shangfeng Yang Ming Cheng Mingkui Wang Yongbo Yuan Junliang Yang Feng Gao Guichuan Xing Zhanhua Wei Lijun Zhang Hin-Lap Yip Mingzhen Liu Qing Shen Longwei Yin Liyuan Han Shengzhong Liu Lianzhou Wang Jingshan Luo Hairen Tan Zhiwen Jin Liming Ding | 2019 | Science Bulletin2019，64，20： | 2 |
| 5 | Polymer Solar Cells Based on the Copolymers of Naphtho[1,2-c:5,6-c]bis(1,2,5-thiadiazole) and Alkoxylphenyl Substituted Benzodithiophene with High Open-Circuit Voltages显示文摘二新奇 naphtho [1,2-c:5,6-c ] 二度(1,2,5-thiadiazole ) 和 alkoxylphenyl 代替了 benzodithiophene 基于的共聚物为聚合物太阳能电池作为施主材料被开发。在在薄电影并且深的 500-800 nm 的范围的产生共聚物展览女人吸收乐队最高分别地占据了 −5.39 eV 和 −5.36 eV 的分子的轨道的精力层次。最好的设备表演被 P1 完成,与 0.85 V 的开电路的电压, 8.65 mA·cm −2, 的电线走火电流密度 37.8% 的一个 fill 因素,和 2.78% 的功率变换效率。 | Liqian Liu Guichuan Zhang Baitian He Fei Huang | 2015 | Chinese Journal of Chemistry2015，33，8： | 2 |
| 6 | Origin of High Efficiency and Long-Term Stability in Ionic Liquid Perovskite Photovoltaic显示文摘Environment-friendly protic amine carboxylic acid ionic liquids(ILs)as solvents is a significant breakthrough with respect to traditional highly coordinating and toxic solvents in achieving efficient and stable perovskite solar cells(PSCs)with a simple one-step air processing and without an antisolvent treatment approach.However,it remains mysterious for the improved efficiency and stability of PSCs without any passivation strategy.Here,we unambiguously demonstrate that the three functions of solvents,additive,and passivation are present for protic amine carboxylic acid ILs.We found that the ILs have the capability to dissolve a series of perovskite precursors,induce oriented crystallization,and chemically passivate the grain boundaries.This is attributed to the unique molecular structure of ILs with carbonyl and amine groups,allowing for strong interaction with perovskite precursors by forming C=O…Pb chelate bonds and N-H…I hydrogen bonds in both solution and film.This finding is generic in nature with extension to a wide range of IL-based perovskite optoelectronics. | Lingfeng Chao Tingting Niu Hao Gu Yingguo Yang Qi Wei Yingdong Xia Wei Hui Shouwei Zuo Zhaohua Zhu Chengjie Pei Xiaodong Li Jing Zhang Junfeng Fang Guichuan Xing Hai Li Xiao Huang Xingyu Gao Chenxin Ran Lin Song Li Fu Yonghua Chen Wei Huang | 2020 | Research2020，，1： | 2 |
| 7 | Ruddlesden–Popper Perovskite for Stable Solar Cells显示文摘Three-dimensional metal-halide perovskites have emerged as promising light harvesting materials for converting sunlight to electricity in the last few years.High power conversion efficiency of 23.3%has been demonstrated.However,the main challenge that currently limits the application of the perovskite solar cells is the long-term stability,which has ambient,thermal,and photo stability weaknesses. | Chao Liang Dandan Zhao Yan Li Xiaojun Li Shaomin Peng Guosheng Shao Guichuan Xing | 2018 | Energy & Environmental Materials2018，1，4： | 1 |
| 8 | Near-Infrared-Excitable Organic Ultralong Phosphorescence through Multiphoton Absorption显示文摘Organic ultralong room-temperature phosphorescence(OURTP)with a long-lived triplet excited state up to several seconds has triggered widespread research interests,but most OURTP materials are excited by only ultraviolet(UV)or blue light owing to their unique stabilized triplet-and solid-state emission feature.Here,we demonstrate that near-infrared-(NIR-)excitable OURTP molecules can be rationally designed by implanting intra/intermolecular charge transfer(CT)characteristics into Haggregation to stimulate the efficient nonlinear multiphoton absorption(MPA).The resultant upconverted MPA-OURTP show ultralong lifetimes over 0.42 s and a phosphorescence quantum yield of~37%under both UV and NIR light irradiation.Empowered by the extraordinary MPA-OURTP,novel applications including two-photon bioimaging,visual laser power detection and excitation,and lifetime multiplexing encryption devices were successfully realized.These discoveries illustrate not only a delicate design map for the construction of NIR-excitable OURTP materials but also insightful guidance for exploring OURTP-based nonlinear optoelectronic properties and applications. | Ye Tao Lele Tang Qi Wei Jibiao Jin Wenbo Hu Runfeng Chen Qingqing Yang Huanhuan Li Ping Li Guichuan Xing Quli Fan Chao Zheng Wei Huang | 2020 | Research2020，，1： | 1 |
| 9 | Influence of mixed organic cations on the nonlinear optical properties of lead tri-iodide perovskites显示文摘Metal halide perovskite materials have been widely studied recently due to their excellent optoelectronic properties.Among these materials,organic-inorganic hybrid perovskites have attracted much attention because of their relatively soft framework,which makes them more suitable for nonlinear optical(NLO)applications.However,there is rare physical mechanism study on the coexistence of two-photon absorption(TPA)and saturable absorption(SA)in organic-inorganic hybrid perovskite materials.To clarify this issue,the NLO properties of mixed cation perovskite MA1-xFAxPbI3[MA=CH3NH3,FA=CH(NH2)2,x=0,0.2,0.4,0.6,and 0.8]thin films are investigated in this paper.Based on the nonlinear transmittance and femtosecond-transient absorption spectrum measurements,it is found that the MA1-xFAxPbI3 materials exhibit NLO behavior dependent on excitation intensity.The TPA coefficient of MA1-xFAxPbI3 decreases with the increase of formamidinium(FA)content,while the relevant saturable intensity increases.In addition,it is revealed that the linear absorption process from valence band 2 to valance band 1 still exists even under a very low excitation intensity.With the increase of excitation intensity,the light transmittance at 1300 nm decreases first and then increases sharply,which also supports the explanation for the coexistence of TPA and SA.It is expected that our findings will promote the application of perovskite materials in nonlinear optoelectronic devices. | XUANYU ZHANG SHUYU XIAO RUXUE LI TINGCHAO HE GUICHUAN XING AND RUI CHEN | 2020 | Photonics Research2020，8，9： | 1 |
| 10 | Low threshold, amplified spontaneous emission from core seeded semiconductor nanotetrapods incorp orated into a sol-gel matrix显示文摘 | Liao Yile Xing Guichuan Mishra Nimai | 2012 | Advanced Materials2012，24，23： | 1 |
| 11 | Discharge characteristics of protective LaB_6 thin films in an AC plasma display panel显示文摘Lanthanum hexaboride (LaB 6) thin films were used as protective layers in alternating current plasma display panels (AC-PDPs).The firing voltages and discharge delay time of protective LaB 6 thin films were evaluated and compared with the conventional protective MgO layers in planar-type test panels filled with 5%-15% Ne-Xe.By employing LaB 6 thin films as protective layers,both the firing voltages and discharge delay time decreased drastically.Improvements in the discharge properties of the LaB 6 thin film could be attributed to the lower work function,offering more priming electrons during the discharge process. | WANG XiaoJu DENG Jiang LIU ZengYi LIN ZuLun QI KangCheng CAO GuiChuan | 2012 | Chinese Science Bulletin2012，57，20： | 1 |
| 12 | Highly stable and repeatable femtosecond soliton pulse generation from saturable absorbers based on twodimensional Cu3-xP nanocrystals显示文摘Heavily doped colloidal plasmonic nanocrystals have attracted great attention because of their lower and adjustable free carrier densities and tunable localized surface plasmonic resonance bands in the spectral range from near-infra to mid-infra wavelengths.With its plasmon-enhanced optical nonlinearity,this new family of plasmonic materials shows a huge potential for nonlinear optical applications,such as ultrafast switching,nonlinear sensing,and pulse laser generation.Cu3-xP nanocrystals were previously shown to have a strong saturable absorption at the plasmonic resonance,which enabled high-energy Q-switched fiber lasers with 6.1μs pulse duration.This work demonstrates that both high-quality mode-locked and Q-switched pulses at 1560 nm can be generated by evanescently incorporating two-dimensional(2D)Cu3-xP nanocrystals onto a D-shaped optical fiber as an effective saturable absorber.The 3 dB bandwidth of the mode-locking optical spectrum is as broad as 7.3 nm,and the corresponding pulse duration can reach 423 fs.The repetition rate of the Q-switching pulses is higher than 80 kHz.Moreover,the largest pulse energy is more than 120μJ.Note that laser characteristics are highly stable and repeatable based on the results of over 20 devices.This work may trigger further investigations on heavily doped plasmonic 2D nanocrystals as a next-generation,inexpensive,and solution-processed element for fascinating photonics and optoelectronics applications. | Haoran MU Zeke LIU Xiaozhi BAO Zhichen WAN Guanyu LIU Xiangping LI Huaiyu SHAO Guichuan XING Babar SHABBIR Lei LI Tian SUN Shaojuan LI Wanli MA Qiaoliang BAO | 2020 | Frontiers of Optoelectronics2020，13，2： | 1 |
| 13 | Reactive oxygen species, ABA and nitric oxide interactions on the germination of warm-season C4-grasses显示文摘 | Gautam Sarath Guichuan Hou Lisa M. Baird Robert B. Mitchell | 2007 | Planta2007，，3： | 1 |
| 14 | Large current carbon nanotube emitter growth using nickel as a buffer layer显示文摘 | Zexiang Chen Guichuan Cao Qiang Zhang | 2007 | Nanotechnology2007，18，： | 1 |
| 15 | Reactive oxygen species, ABA and nitric oxide interactions on the germination of warm-season C4-grasses显示文摘 | Gautam Sarath Guichuan Hou Lisa M. Baird Robert B. Mitchell | 2007 | Planta2007，，3： | 1 |
| 16 | Long-range balanced electron and hole-transport lengths in organic-inorganic CH3NH3PbI3 显示文摘 | Xing Guichuan Mathews N Sun Shuangyong | 2013 | Science2013，342，6156： | 1 |
| 17 | Simulation Study on Virtual Prototype of Pumping Well System 显示文摘 | HukunYang Guichuan Zhan Jingyuan Yang Lifeng Qin | 2013 | Advanced Materials Research2013，，1： | 1 |
| 18 | Nitric oxide accelerates seed germination in warm-season grasses显示文摘 | Gautam Sarath Paul C. Bethke Russell Jones Lisa M. Baird Guichuan Hou Robert B. Mitchell | 2006 | Planta2006，，6： | 1 |
| 19 | Probing the dynamic structural changes of DNA using ultrafast laser pulse in graphene-based optofluidic device显示文摘The ultrafast monitoring of deoxyribonucleic acid(DNA)dynamic structural changes is an emerging and rapidly growing research topic in biotechnology.The existing optical spectroscopy used to identify different dynamical DNA structures lacks quick response while requiring large consumption of samples and bulky instrumental facilities.It is highly demanded to develop an ultrafast technique that monitors DNA structural changes with the external stimulus or cancer-related disease scenarios.Here,we demonstrate a novel photonic integrated graphene-optofluidic device to monitor DNA structural changes with the ultrafast response time.Our approach is featured with an effective and straightforward design of decoding the electronic structure change of graphene induced by its interactions with DNAs in different conformations using ultrafast nanosecond pulse laser and achieving refractive index sensitivity of~3×10^(−5) RIU.This innovative technique for the first time allows us to perform ultrafast monitoring of the conformational changes of special DNA molecules structures,including G-quadruplex formation by K+ions and i-motif formation by the low pH stimulus.The graphene-optofluidic device as presented here provides a new class of label-free,ultrafast,ultrasensitive,compact,and cost-effective optical biosensors for medical and healthcare applications. | Bannur NShivananju Lu Zhou Yuefeng Yin Wenzhi Yu Babar Shabbir Haoran Mu Xiaozhi Bao Yiqiu Zhang Sun Tian Qingdong Ou Shaojuan Li Mohammad MHossain Yupeng Zhang Huaiyu Shao Guichuan Xing Nikhil V.Medhekar Chang-Ming Li Jian Liu Qiaoliang Bao | 2021 | InfoMat2021，3，3： | 1 |
| 20 | Phase Regulation and Defect Passivation Enabled by Phosphoryl Chloride Molecules for Efficient Quasi‑2D Perovskite Light‑Emitting Diodes显示文摘Quasi-2D perovskites have attracted tremendous interest for application as lightemission layers in light-emitting diodes(LEDs).However,the heterogeneous n phase and non-uniform distribution still severely limit the further development of quasi-2D perovskite LEDs(Pero-LEDs).Meanwhile,the increased defect density caused by the reduced dimension and grain size induces non-radiative recombination and further deteriorates the device performance.Here,we found that a series of molecules containing phosphoryl chloride functional groups have noticeable enhancement effects on the device performance of quasi-2D Pero-LEDs.Then,we studied the modification mechanism by focusing on the bis(2-oxo-3-oxazolidinyl)phosphinic chloride(BOPCl).It is concluded that the BOPCl can not only regulate the phase distribution by decreasing the crystallization rate but also remain in the grain boundaries and passivate the defects.As a result,the corresponding quasi-2D Pero-LEDs obtained a maximum external quantum efficiency(EQE_(max))of 20.82%and an average EQE(EQE_(ave))of around 20%on the optimal 50 devices,proving excellent reproducibility.Our work provides a new selection of molecular types for regulating the crystallization and passivating the defects of quasi-2D perovskite films. | Mingliang Li Yaping Zhao Jia Guo Xiangqian Qin Qin Zhang Chengbo Tian Peng Xu Yuqing Li Wanjia Tian Xiaojia Zheng Guichuan Xing Wen‑Hua Zhang Zhanhua Wei | 2023 | Nano-Micro Letters2023，15，8： | 1 |
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