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| 1 | Top-emitting thermally activated delayed fluorescence organic light-emitting devices with weak light-matter coupling显示文摘Resonance interaction between a molecular transition and a confined electromagnetic field can lead to weak or strong light-matter coupling.Considering the substantial exciton–phonon coupling in thermally activated delayed fluorescence(TADF)materials,it is thus interesting to explore whether weak light-matter coupling can be used to redistribute optical density of states and to change the rate of radiative decay.Here,we demonstrate that the emission distribution of TADF emitters can be reshaped and narrowed in a top-emitting organic light-emitting device(OLED)with a weakly coupled microcavity.The Purcell effect of weak microcavity is found to be different for TADF emitters with different molecular orientations.We demonstrate that radiative rates of the TADF emitters with vertical orientation can be substantial increased in weakly coupled organic microcavity.These observations can enhance external quantum efficiencies,reduce efficiency roll-off,and improve color-purities of TADF OLEDs,especially for emitters without highly horizontal orientation. | Chunxiu Zang Shihao Liu Mengxin Xu Ruifang Wang Chen Cao Zelin Zhu Jiaming Zhang Hui Wang Letian Zhang Wenfa Xie Chun-Sing Lee | 2021 | Light(Science & Applications)2021，10，7： | 7 |
| 2 | Efficacy of platinum in advanced triple-negative breast cancer with germline BRCA mutation determined by next generation sequencing显示文摘Objective:To compare the efficacy of platinum-and non-platinum-based regimens as first-line treatment for advanced triple-negative breast cancer(TNBC)and analyze the relationship between their efficacy and BRCA gene status.Methods:Retrospectively analyze clinical data of 220 patients diagnosed pathologically with advanced TNBC and treated at the Department of Breast Oncology,Peking University Cancer Hospital from 2013 to 2018 and evaluate the efficacy of chemotherapy.A total of 114 patients had BRCA1/2 gene tested by next generation sequencing(NGS)using peripheral blood,and we analyzed the correlation between their efficacy and BRCA1/2 gene status.Results:Non-platinum-based chemotherapy(NPCT)was administered to 129 and platinum-based chemotherapy(PBCT)to 91 study patients.The clinical benefit rate(CBR)and median progression-free survival(PFS)were not statistically different between NPCT and PBCT groups.The median overall survival(OS)was 30.0 and 22.5 months for PBCT and NPCT group,respectively[P=0.090,hazard ratios(HR)=0.703].BRCA status was assessed in 114 patients,14 of whom had deleterious germline BRCA1/2(g BRCA)mutations(seven in each group).In PBCT group,the CBR was 85.7%and 35.1%for patients with and without deleterious g BRCA mutations,respectively(P=0.039).The median PFS were 14.9 and 5.3 months and median OS were 26.5 and 15.5 months for patients with and without deleterious g BRCA mutations,respectively(P=0.001,P=0.161,respectively).Patients in PBCT group had significantly greater rates of grade 3-4 anemia(5.5%vs.0%)and thrombocytopenia(8.8%vs.0%),whereas palmar-plantar erythrodysesthesia(12.4%vs.0%)and peripheral neuropathy(8.6%vs.1.1%)occurred more frequently in NPCT group.Conclusions:Platinum-based regimens are more effective in patients with deleterious g BRCA mutations,but no difference in patients without BRCA gene mutations,so non-platinum is an option in patients without BRCA gene mutations considering the toxicity and side effect.And we recommend that patients with advanced TNBC should have BRCA gene test. | Nan Wang Kun Li Wenfa Huang Weiyao Kong Xiaoran Liu Weijie Shi Feng Xie Hanfang Jiang Guohong Song Lijun Di Quanren Wang Jianjun Yu Huiping Li | 2020 | Chinese Journal of Cancer Research2020，32，2： | 7 |
| 3 | Air-Stable Ultrabright Inverted Organic Light-Emitting Devices with Metal Ion-Chelated Polymer Injection Layer显示文摘Here,this work presents an air-stable ultrabright inverted organic lightemitting device(OLED)by using zinc ionchelated polyethylenimine(PEI)as electron injection layer.The zinc chelation is demonstrated to increase the conductivity of the PEI by three orders of magnitude and passivate the polar amine groups.With these physicochemical properties,the inverted OLED shows a record-high external quantum efficiency of 10.0% at a high brightness of 45,610 cd m^(-2) and can deliver a maximum brightness of 121,865 cd m^(-2).Besides,the inverted OLED is also demonstrated to possess an excellent air stability(humidity,35%)with a half-brightness operating time of 541 h@1000 cd m^(-2) without any protection nor encapsulation. | Shihao Liu Chunxiu Zang Jiaming Zhang Shuang Tian Yan Wu Dong Shen Letian Zhang Wenfa Xie Chun-Sing Lee | 2022 | Nano-Micro Letters2022，14，1： | 3 |
| 4 | A flexible,multifunctional,optoelectronic anticounterfeiting device from high-performance organic light-emitting paper显示文摘As a primary anticounterfeiting technology,most paper anticounterfeiting devices take advantage of photoresponsive behaviors of certain security materials or structures,thus featuring low-security threshold,which has been a critical global issue.To incorporate optoelectronic devices into existing anticounterfeiting technology suggests a feasible avenue to address this challenge.Here we report a high-performance organic light-emitting paper-based flexible anticounterfeiting(FAC)device with multiple stimuli-responsiveness,including light,electricity,and their combination.Without sacrificing the preexisted security information on the paper,we fabricate FAC device in a facile,low-cost yet high-fidelity fashion by integrating patterned electro-responsive and photo-responsive organic emitters onto paper substrates.By introducing optical microcavities,the FAC device shows considerable color shift upon different viewing angle and applied voltage,which is easily discernible by naked eyes.Notably,the FAC device is bendable,unclonable,and durable(a half-lifetime over 4000 hours at 100 cd m^(−2)). | Teng Pan Shihao Liu Letian Zhang Wenfa Xie Cunjiang Yu | 2022 | Light(Science & Applications)2022，11，3： | 2 |
| 5 | High-efficient non-doped type white organic light-emitting devices using an electron/exciton blocker 显示文摘 | Xie Wenfa Liu Shiyong | 2005 | Materials Science Forum2005，，： | 1 |
| 6 | High-contrast and high-efficiency microcavity top-emitting white organic light-emitting devices显示文摘 | Wenyu Ji Letian Zhang Zhang Tianyu Wenfa Xie Hanzhuang Zhang | 2009 | Organic Electronics2009，，2： | 1 |
| 7 | Ultra-high general and special color rendering index white organic light-emitting device based on a deep red phosphorescent dye显示文摘 | Yang Li Wei Zhang Letian Zhang Xuemei Wen Yongming Yin Shihao Liu Wenfa Xie Hongyu Zhao Silu Tao | 2013 | Organic Electronics2013，，12： | 1 |
| 8 | High efficiency small molecule white organic light-emitting devices with a multilayer structure显示文摘 | Huishan Yang Wenfa Xie Yi Zhao Jingying Hou Shiyong Liu | 2006 | Solid State Communications2006，，9： | 1 |
| 9 | Non-doped-type white organic light-emitting devices based on yellow-e-mitting ultrathin 5,6, 11, 12-tetraphenylnaphthacene and blue-emitting 4, 4-bis ( 2,2-diphenyl vinyl)-1,1-biphenyl 显示文摘 | Xie Wenfa Wu Zhijun Liu Shiyong | 2003 | J Phys D: Appl Phys2003，，： | 1 |
| 10 | Efficient and Low-voltage Phosphorescent Organic Light-emitting Devices Based on Blue Iridium Complex Host显示文摘 | YU Jing YIN Yongming XIE Wenfa ZHANG Letian | 2015 | Chemical Research in Chinese Universities2015，31，4： | 0 |
| 11 | Flexible top-illuminated organic photodetector using an ultrathin-metal-based transparent electrode显示文摘Top-illuminated structure facilitates the integration of organic photodetectors(OPDs)into high-resolution flexible wearable light detection systems by allowing the OPDs to be deposited on the bottom readout circuit.However,constructing this structure poses a challenge as it demands metallic electrodes with both high optical transparency and high electrical conductivity.But to achieve practical sheet resistances,most semitransparent metallic electrodes tend to reflect a large portion of incident light instead of allowing it to be absorbed by the photoactive layer of the OPDs.This,in turn,results in reduced photocurrent generation.To address this issue,a semiconducting germanium(Ge)film is introduced into a sliver(Ag)film,effectively reducing its reflectivity by lessening scattering.The Ge film also changes how the Ag film grows,further reducing its absorption by lowering the critical thickness needed for forming a continuous film.This approach yields a 10 nm metallic electrode with a transmittance of 70%,a reflectivity of 12%,and a sheet resistance of 35.5Ω/□.Using this metallic electrode,flexible OPDs exhibit a high photo-to-dark current ratio of 2.9×10^(4)and improved mechanical properties.This finding highlights the benefits of the top-illuminated structure,which effectively reduces losses caused by waveguided modes of the incident light. | YUANHE WANG XINYI LI SHIHAO LIU LETIAN ZHANG WENFA XIE | 2023 | Photonics Research2023，11，12： | 0 |
| 12 | Highly Efficient White Organic Light-emitting Devices with Optimized Electron Transporting Layers显示文摘We fabricated three phosphorescent blue organic light-emitting devices based on blue phosphor of iri-dium(Ⅲ) bis[(4,6-difluorophenyl)-pyridinato-N,C2'](Firpic) with different electron transporting layer(ETL) materialsBy analyzing efficiency curves and spectral characteristics, the significant effect of ETL on many aspects of deviceperformance was demonstrated. With optimized ETL, the characteristics of devices, such as voltage and efficiencywere significantly improved. Combined with a yellow phosphor of iridium(Ⅲ) bis(4-phenylthieno[3,2-c]pyridinato-N,C2') acetylacetonate(PO-01), phosphorescent white organic light-emitting devices(PhWOLEDs) were obtained.Then, with an aim to promote the performance of the PhWOLEDs~ a thin layer of 4,4',4"-tri(N-carbazolyl)-triphenylamine(TCTA) was introduced between two light emission layers, and the diffusion of excitons was confined.The outperformance device fabricated with 4,7-diphenyl-l,10-phenanthroline(Bphen) as the electron transportinglayer exhibited a peak current efficiency of 36.6 cd/A, a peak power efficiency of 19.2 lm/W, and the InternationalCommission on Illumination coordinates(0.37, 0.46). | ZHANG Tianyu ZHENG Yu WANG Chengming ZHANG Yixin LIU Shihao MA Jian ZHANG Letian XIE Wenfa CHEN Ping LIN Jun LIU Yujuan | 2017 | Chemical Research in Chinese Universities2017，33，2： | 0 |
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