Article
Chemistry, Multidisciplinary
Ju Zhang, Xuanchang Xing, Dongmin Qian, Airu Wang, Lianghui Gu, Zhiyuan Kuang, Jingmin Wang, Hao Zhang, Kaichuan Wen, Wenjie Xu, Meiling Niu, Xuerong Du, Lingzhi Yuan, Chensi Cao, Yu Cao, Lin Zhu, Nana Wang, Chang Yi, Wei Huang, Jianpu Wang
Summary: In this study, perovskite composite films for high performance PeLEDs were developed using zwitterion 3-aminopropanesulfonic acid (APS) as an additive. The sulfonic group of APS can passivate deep and shallow level defects in perovskites via coordinate and hydrogen bonding, leading to improved stability and efficiency of the perovskite composite films.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Le Ma, Boning Han, Fengjuan Zhang, Leimeng Xu, Tao Fang, Shalong Wang, Jizhong Song
Summary: This review focuses on the application of metal halide perovskites in light-emitting diodes, discussing the types of defects affecting their efficiency and suppression strategies, as well as looking forward to future directions.
APPLIED MATERIALS TODAY
(2021)
Article
Chemistry, Multidisciplinary
Yun Luo, Lingmei Kong, Lin Wang, Xingyu Shi, Hao Yuan, Wenqiang Li, Sheng Wang, Zhijun Zhang, Wenqing Zhu, Xuyong Yang
Summary: The electroluminescence performance and long-term stability of perovskite light-emitting diodes (PeLEDs) are greatly improved by using an ionic liquid to control the growth of perovskite films, resulting in uniform films and reduced defect states.
Article
Chemistry, Multidisciplinary
Yong-Chun Ye, Yang Shen, Wei Zhou, Shi-Chi Feng, Jiang-Ying Wang, Yan-Qing Li, Jian-Xin Tang
Summary: Perovskite light-emitting diodes (PeLEDs) show promise for next-generation high-definition displays due to their excellent color purity and low power consumption. A novel strategy of interfacial molecule control is demonstrated using a bifunctional material to enhance interaction and exciton management between the perovskite and electron-transport layers. This modification layer not only passivates surface defects but also blocks interfacial exciton transfer, resulting in improved external quantum efficiencies for green, blue, and red emissions.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Chung Hyeon Jang, Ye In Kim, Amit Kumar Harit, Jung Min Ha, Sejeong Park, Young Wook Noh, Ah-young Lee, Kyeong Su Kim, Jae Woong Jung, Han Young Woo, Myoung Hoon Song
Summary: This study reports highly efficient green-emitting PeLEDs by introducing semiconducting molecular additives (Fl-OEGA and Fl-C8A). The conjugated additives exist primarily at the grain boundaries of perovskite, reducing the contact potential difference and residual tensile stress. The PeLEDs with Fl-OEGA show minimal shift in turn-on voltage and less decrease in current density compared to devices with insulating EDEA. Furthermore, the 3D CsPbBr3-PeLEDs achieve the highest external quantum efficiency of 21.3% with the incorporation of semiconducting Fl-OEGA as a new multifunctional additive.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Xiaomeng Zhang, Lei Shi, Junyang Bai, Feijiu Wang, Maowei Jiang
Summary: By engineering the heterointerface, defect passivation is performed on both the bottom and top surfaces of the perovskite film using semiconducting passivating molecules. This enhances the electron injection and boosts the electroluminescence of perovskite light-emitting diodes (PeLEDs), resulting in efficient PeLEDs with significantly improved external quantum efficiency.
Article
Optics
Lei Cai, Jiangyu Chen, Jiaqing Zang, Jungui Zhou, Yatao Zou, Guilin Bai, Zhewei Chen, Tao Song, Chuan-Kui Wang, Baoquan Sun
Summary: An intriguing strategy is developed to realize high-quality quasi-2D perovskite thin film by tuning the rheological properties of perovskite precursor and modulating the substrate surface tension. A large-area (25 cm(2)) quasi-2D perovskite light-emitting diode (PeLED) achieves an external quantum efficiency of 20.7% with uniform emitting characteristics, a record value among analogous same-size PeLEDs. This work may pave the way to realize high-performance large-area perovskite optoelectronic devices.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Chenyang Zhao, Wenping Wu, Hongmei Zhan, Wei Yuan, Hongxiang Li, Dezhong Zhang, Dapeng Wang, Yanxiang Cheng, Shiyang Shao, Chuanjiang Qin, Lixiang Wang
Summary: A novel phosphonate/phosphine oxide dyad molecular additive (PE-TPPO) is reported to enhance the device efficiency of metal-halide perovskite LEDs. The additive possesses unique dual roles of defect passivation and carrier radiative recombination enhancement. By modifying the defects and increasing local carrier concentration, this additive significantly improves the photoluminescence intensity and homogeneity of the perovskite film. The resulting green PeLEDs exhibit state-of-the-art efficiencies in terms of external quantum efficiency, current efficiency, and power efficiency.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Yang Shen, Hai-Yan Wu, Yan-Qing Li, Kong-Chao Shen, Xingyu Gao, Fei Song, Jian-Xin Tang
Summary: This study introduces a simple device architecture to achieve efficient blue PeLEDs by manipulating perovskite crystallization nucleation at interfaces, leading to highly compact perovskite nanocrystal assemblies. This strategy significantly improves the external quantum efficiency (EQE) of blue PeLEDs and enhances operational stability.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yang Shen, Yan-Qing Li, Kai Zhang, Liu-Jiang Zhang, Feng-Ming Xie, Li Chen, Xiao-Yi Cai, Yu Lu, Hao Ren, Xingyu Gao, Haijiao Xie, Hongying Mao, Satoshi Kera, Jian-Xin Tang
Summary: Perovskite light-emitting diodes (PeLEDs) have potential in solution-processable display applications. However, the performance of blue PeLEDs is hindered by trap-mediated nonradiative recombination losses and halide phase segregation. Modulating mixed-halide perovskite materials through defect passivation can improve the performance of sky-blue PeLEDs, achieving high external quantum efficiency and stable emission.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
J. H. Park, A. K. Harit, C. H. Jang, J-E Jeong, H. Y. Woo, M. H. Song
Summary: This study successfully demonstrated the fabrication of a green-emitting PeLED with excellent performance by incorporating a specific conjugated polyelectrolyte MPS2-TEA into the perovskite solution. The perovskite films with MPS2-TEA showed improved optical properties and lower defect density compared to the pristine films.
MATERIALS TODAY ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Ying-Yi Tang, Yang Shen, Yi Yu, Kai Zhang, Bing-Feng Wang, Jian-Xin Tang, Yan-Qing Li
Summary: By introducing GASCN and PCA, the performance of blue perovskite light-emitting diodes is improved, achieving stable emission and improved external quantum efficiencies.
Article
Chemistry, Physical
Yue Gao, Chao Luo, Cheng Yan, Wen Li, Chuanqi Liu, Weiqing Yang
Summary: In this study, high-performance deep-blue perovskites CsPb(Br/Cl)(3) were prepared using a Cu2+ doping strategy and post-treatment Br- anion exchange. The optimized CsPb(Br/Cl)(3) nanosheets exhibited enhanced PLQY of 94% and better humidity stability for 30 days, leading to the fabrication of deep-blue PeLEDs with high luminance and current density.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Yongjie Liu, Shuxin Wang, Zhiqiu Yu, Guoyi Chen, Cheng Wang, Ti Wang, Weijun Ke, Guojia Fang
Summary: Efficient and stable pure-blue PeLEDs are achieved by controlling phase distribution, passivation of defects, and surface modifications using multifunctional phenylethylammonium trifluoroacetate (PEATFA) in reduced-dimensional p-F-PEA(2)Cs(n-1)Pb(n)(Br0.55Cl0.45)(3n+1) polycrystalline perovskite films. The use of PEA(+) instead of p-F-PEA(+) results in large-n low-dimensional perovskites, which facilitate charge transport. The interaction between TFA(-) and perovskites reduces defects, and the -CF3 group in TFA- enhances electronic injection. This additive strategy improves radiative recombination and carrier transport, leading to a maximum EQE of 11.87% at 468 nm, the highest reported for pure-blue PeLEDs.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Qiangqiang Wang, Xuanyu Zhang, Lei Qian, Chaoyu Xiang
Summary: Perovskite quantum dot light-emitting diodes (QLEDs) have potential for next-generation displays. The electron-accepting property of poly-[bis-(4-phenyl) (2,4,6-trimethylphenyl) amine] (PTAA) leads to the charging of quantum dot (QD) films, resulting in imbalance of charge injection and increased nonradiative recombination, affecting the QLEDs performance. This study compared two polymers, poly-(methyl methacrylate) (PMMA) and poly-(vinylpyrrolidone) (PVP), as hole interface buffer layers for QD films. The devices with PMMA achieved a maximum external quantum efficiency of 20.71%.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Fanghao Ye, Huijun Zhang, Pang Wang, Jinlong Cai, Liang Wang, Dan Liu, Tao Wang
CHEMISTRY OF MATERIALS
(2020)
Article
Chemistry, Physical
Hui Wang, Fabao Li, Pang Wang, Rui Sun, Wan Ma, Mengting Chen, Weiqiang Miao, Dan Liu, Tao Wang
ADVANCED ENERGY MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Yalun Wang, Hui Wang, Mengting Chen, Pang Wang, Yuchao Mao, Wenjiao Han, Tao Wang, Dan Liu
Summary: A bilayer antireflective coating has been designed to reduce photon loss and increase the efficiency of perovskite solar cells by enhancing glass transmittance. By adjusting the refractive index and film thickness of each layer, significant improvements in short-circuit current density and power conversion efficiency can be achieved. This simple yet effective strategy can be applied to enhance the efficiency of various types of solar cells.
SCIENCE CHINA-MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Pang Wang, Wei Li, Oskar J. Sandberg, Chuanhang Guo, Rui Sun, Hui Wang, Donghui Li, Huijun Zhang, Shili Cheng, Dan Liu, Jie Min, Ardalan Armin, Tao Wang
Summary: Building perovskite/organic tandem solar cells can enhance light absorption range and reduce photovoltage loss. The material of hole transport layer plays a critical role in efficiency.
Article
Chemistry, Physical
Chuanhang Guo, Donghui Li, Liang Wang, Baocai Du, Zhi-Xi Liu, Ziqiu Shen, Pang Wang, Xue Zhang, Jinlong Cai, Shili Cheng, Cong Yu, Hui Wang, Dan Liu, Chang-Zhi Li, Tao Wang
Summary: The cold-aging strategy can mediate the pre-aggregation of PM6 polymer in solution through a disorder-order transition, resulting in dense and fine PM6 aggregates with enhanced pi-pi stacking in blend films with non-fullerene acceptors. This approach improves charge mobility and leads to enhanced power conversion efficiency in organic solar cells.
ADVANCED ENERGY MATERIALS
(2021)
Article
Energy & Fuels
Weiqiang Miao, Chuanhang Guo, Donghui Li, Teng Li, Pang Wang, Yujie Yang, Dan Liu, Tao Wang
Summary: The study investigated the impact of incorporating CsPbBr3 PQDs into PM6:Y6-BO organic solar cells, finding that the addition of PQDs can enhance device efficiency without compromising device stability.
Article
Polymer Science
Shili Cheng, Liang Wang, Chuanhang Guo, Donghui Li, Jinlong Cai, Weiqiang Miao, Baocai Du, Pang Wang, Dan Liu, Tao Wang
Summary: The study found that the new non-fullerene acceptor BTP-4F-C9-20 exhibits good compatibility and solubility in organic solar cells, showing good binary interaction with the polymer donor PM6. Introducing the acceptor Y7-BO with higher chi value increased phase separation and improved device performance in the ternary system.
Article
Polymer Science
Yujie Yang, Donghui Li, Pang Wang, Xue Zhang, Huijun Zhang, Baocai Du, Chuanhang Guo, Tao Wang, Dan Liu
Summary: In this study, bulk heterojunction nanoparticles composed of p-type polymer donor PBDB-T and non-fullerene acceptor ITIC are produced by the micro-emulsion method and demonstrated to be efficient photocatalysts for hydrogen generation through water splitting under full spectrum illumination. The nanoscale morphology of these nanoparticles, which can be controlled by factors such as donor/acceptor ratio, binary solvent volume fraction, and surfactant content, determines the photocatalytic efficiency. The best-performing nanoparticles show a remarkable hydrogen evolution rate of 257 mmol h(-1) g(-1), benefiting from ideal phase separation, reasonable particle size, and efficient charge separation and transfer. This work provides a rational guide for producing bulk heterojunction nanoparticles made of organic semiconductors with high photocatalytic efficiency.
Article
Chemistry, Multidisciplinary
Donghui Li, Chuanhang Guo, Xue Zhang, Baocai Du, Cong Yu, Pang Wang, Shili Cheng, Liang Wang, Jinlong Cai, Hui Wang, Dan Liu, Huifeng Yao, Yanming Sun, Jianhui Hou, Tao Wang
Summary: The study utilized a solution-incubated pre-aggregation strategy to successfully aggregate non-fullerene acceptors within the pseudo-BHJ structure, resulting in a significant improvement in efficiency for organic solar cells.
SCIENCE CHINA-CHEMISTRY
(2022)
Article
Chemistry, Physical
Chen Gao, Pang Wang, Hui Wang, Cong Yu, Baocai Du, Huijun Zhang, Teng Li, Dan Liu, Tao Wang
Summary: This study demonstrates a binary additive engineering strategy to achieve a high efficiency and minor hysteresis perovskite solar cell device by spray-coating a hybrid perovskite in air. The spray-coated perovskite films with hierarchical structure show improved efficiency through enhanced light absorption and reduced trap-assisted charge recombination. The addition of specific additives in the perovskite precursor contributes to the increased device efficiency and reduced hysteresis.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Hui Wang, Pang Wang, Yuandong Sun, Chen Gao, Weiqiang Miao, Donghui Li, Yujie Yang, Tao Wang, Dan Liu
Summary: Charge transport layers are crucial for the efficiency and stability of perovskite solar cells. The combination of p-type and n-type charge transfer complexes as transport layers enhances charge transport and photoconductivity, resulting in improved performance and stability of PSCs.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Physics, Condensed Matter
Chen Gao, Hui Wang, Pang Wang, Jinlong Cai, Yuandong Sun, Cong Yu, Teng Li, Xiaoshuai Zhang, Dan Liu, Tao Wang
Summary: This study demonstrated the use of additive engineering to improve the efficiency of spray-coated perovskite solar cells (PSCs). The (4-methoxyphenyl) potassium trifluoroborate (C7H7BF3KO) was used to passivate the perovskite film and eliminate hysteresis. The results showed that the F in BF3- can form hydrogen bonds with the H atom in the MA(+)/FA(+) ions, reducing the generation of vacancies and improving device efficiency. Additionally, the K+ ions and reduced vacancies can inhibit ion migration, eliminating hysteresis.
JOURNAL OF SEMICONDUCTORS
(2022)
Article
Chemistry, Multidisciplinary
Donghui Li, Chuanhang Guo, Xue Zhang, Baocai Du, Pang Wang, Shili Cheng, Jinlong Cai, Hui Wang, Dan Liu, Huifeng Yao, Jianhui Hou, Tao Wang
Summary: Heating-induced aggregation and sequential casting strategies can effectively control the aggregation and morphology of nonfullerene acceptors within the photoactive layer, leading to improved performance of organic solar cells.
Article
Materials Science, Multidisciplinary
Teng Li, Huijun Zhang, Cong Yu, Pang Wang, Hui Wang, Xiaoshuai Zhang, Yuandong Sun, Dan Liu, Tao Wang
Summary: Introducing amidine ligands has been shown to enhance the performance of blue PeLEDs based on perovskite NCs, reducing nonradiative recombination and improving charge transport.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
