Article
Chemistry, Multidisciplinary
Xiao Wu, Junjie Ma, Minchao Qin, Xinlu Guo, Yuhao Li, Zhaotong Qin, Jianbin Xu, Xinhui Lu
Summary: Light soaking has been found to enhance device performance of CsPb(I1-xBrx)(3) based PSCs by promoting the migration of halide ions, leading to defect passivation and device improvements. Incorporating slightly over-stoichiometric PbI2 in the precursor is proposed as an effective means to suppress the light soaking effect.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Review
Chemistry, Physical
Lu Lin, Li Yang, Guozheng Du, Xiaofeng Li, Ya-nan Li, Jidong Deng, Kun Wei, Jinbao Zhang
Summary: Perovskite solar cells (PSCs) have potential for photovoltaic applications due to their simple fabrication process, low material cost, and high power conversion efficiencies. However, the instability and poor reliability of PSCs, particularly the light-soaking effect (LSE), hinder their practical use. This review explores the transient behaviors and physical mechanisms behind the LSE, as well as effective approaches to mitigate or eliminate this effect. The study provides insights into the LSE physics and guidance for improving the photostability of PSCs.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yu Ouyang, Xingxing Jiang, Feng Jiang, Lihui Li, Hepeng Zhao, Chi Zhang, Min Zheng, Weihao Zheng, Ying Jiang, Xiaoli Zhu, Yexin Feng, Xiujuan Zhuang
Summary: Understanding and manipulating the photoluminescence of all-inorganic perovskites through doping rare earth elements has shown promising results for light-emitting diode applications. Synthesized rare earth-doped 3D all-inorganic perovskite flakes exhibit narrow and broad emission peaks, with color tuning capability from red to green under light-soaking. Photoinduced reduction of defects density and proposed defect-passivation mechanism suggest potential for optical tuning in optoelectronic devices.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yanfeng Miao, Xiaomin Liu, Yuetian Chen, Taiyang Zhang, Tianfu Wang, Yixin Zhao
Summary: Introducing diammonium iodide can improve the preparation process of CsPbI3, slowing down the phase-transition rate and passivating trap states, thereby increasing the external quantum efficiency of PeLEDs. PeLEDs prepared by this method have high conductivity and reduced trap states, and have a wide processing window suitable for rapid production of large-area PeLED modules.
ADVANCED MATERIALS
(2021)
Article
Optics
Guozheng Du, Li Yang, Jinbao Zhang
Summary: This study demonstrates the profound impact of doping status of organic hole transport materials (HTMs) on the light soaking effect (LSE) in perovskite solar cells. Undoped HTMs show a tenfold efficiency enhancement under LSE, attributed to increased film conductivity and changes at the interface. Chemical and structural analysis also reveal that halide ions migration and subsequent photodoping of organic HTMs significantly improve film conductivity and hole mobility, leading to enhanced photostability of the devices.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Analytical
Weigao Wang, Yiyang Li, Yu Duan, Mingxia Qiu, Hua An, Zhengchun Peng
Summary: In this study, a novel polymer TFB was used as the hole transport layer to promote the hole injection with cascade-like energy alignment between PEDOT:PSS and MAPbBr(3) film, improving the performance of PEDOT:PSS layer in perovskite light-emitting diodes.
Article
Physics, Condensed Matter
Bing Wang, Yingdu Liu, Zhiliang Deng, Pei Li, Wanfu Wang, Xiaoping Ouyang, Qiang Xu
Summary: This study successfully prepared a series of copper-based perovskite micro-phosphors using ethanol as a green solvent. The phosphors exhibited adjustable luminescence peaks and high photoluminescence quantum yield. White-light emission phosphors can also be synthesized by simply adjusting the chemical composition.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Energy & Fuels
Haoyu Wang, Shuanghong Wu, Haolin Zhang, Xianghua Yao, Furong Wang, Peng Huang, Xiaodong Liu
Summary: This study demonstrates a method to eliminate the light-soaking effect in CsPbI2Br perovskite film by passivating both anionic and cationic defects. The addition of 4-(chlorosulfonyl)benzoic acid effectively passivates anionic halogen vacancy defects, while Lewis base groups coordinate with Cs+ and Pb2+ to passivate cationic defects. This zwitterionic passivation effect cuts off the path of defect-induced charge recombination and eliminates the light-soaking effect. It provides important insights for future researchers to modulate the light-soaking effect in all-inorganic perovskite solar cells.
Article
Energy & Fuels
Biao Li, Minshen Lin, Chenxia Kan, Pengjie Hang, Yuxin Yao, Zechen Hu, Ying Wang, Yiqiang Zhang, Wenxing Zhong, Deren Yang, Xuegong Yu
Summary: The light soaking effect in perovskite solar cells has attracted significant attention. This study reveals that the power conversion efficiency of FA(x)MA(1-x)PbI(3) perovskite solar cells increases from 7.5% to 20.5% under continuous light illumination. The LS effect is attributed to the modulation of mobile ion distribution by the generated photovoltage, which enhances charge extraction ability and reduces interface recombination. Moreover, the introduction of Cs+ suppresses the LS effect by reducing the density of accumulated mobile ions.
Article
Chemistry, Physical
Haoyu Xu, Runze Lang, Chao Gao, Wei Yu, Wanbing Lu, Shahriar Mohammadi
Summary: This article discusses methods to increase the efficiency and stability of Perovskite solar cells, including introducing alternative hole transport materials and utilizing specific materials between different layers. The results show that these methods can significantly improve the performance of the solar cells.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Yin-chuan Wang, Gui-yong Xiao, Yu-peng Lu
Summary: In this study, ultralong flexible Ce-substituted HA nanofibers decorated by CePO4 nanoparticles were synthesized using a solvothermal method. The number of CePO4 nanoparticles attached to the nanofiber surfaces gradually increased and partially agglomerated as the Ce molar fraction increased. Ce ions were doped into the HA lattice in mixed valences of Ce3+ and Ce4+, significantly increasing grain size and crystallinity of the Ce-HA nanofibers. The effect of Ce3+ doping on the formation mechanism of the samples was also discussed.
Article
Nanoscience & Nanotechnology
David Sunghwan Lee, Jin Hyuck Heo, Jin Kyoung Park, Bong Woo Kim, Hyong Joon Lee, Yun Mi Song, Sang Hyuk Im
Summary: Enhancement in weak-light detection and other photodetection properties was observed for organic-inorganic halide perovskite photodetectors after treatment with benzylammonium iodide (BzAI), resulting in shorter rise and decay times, as well as higher and stable specific detectivity under varying incident light intensities.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Xueyu Dou, Hufei Wang, Fei Yang, Hong Shen, Xing Wang, Decheng Wu
Summary: A novel hydrogel with a core/shell structure is prepared through rational regulation of weak noncovalent interactions. The hydrogel exhibits excellent anti-swelling behaviors and mechanical durability due to the formation of chain entanglements, hydrogen bonds, and ionic coordination. The swelling property of the hydrogel can be easily customized by controlling the ion species and concentrations, and a reversible transition from super-swelling to anti-swelling is achieved by breaking up and rebuilding metal-coordination complexes.
Article
Chemistry, Multidisciplinary
Yoon Ho Lee, Jee Yung Park, Peiran Niu, Hanjun Yang, Dewei Sun, Libai Huang, Jianguo Mei, Letian Dou
Summary: A facile one-step solution process for synthesizing 2D perovskite crystal arrays through meniscus-guided coating on patterned substrates is proposed. This method is further used for the synthesis of lateral heterostructure nanoplate arrays. Six different 2D perovskite nanoplate arrays, including epitaxial heterostructures, are successfully realized. Optical and crystallographic characterizations show the high optical performance and crystallinity of the nanoplates. Moreover, this method is utilized for preparing high-performance 2D perovskite nanoplate photosensor arrays. This strategy can guide the fundamental investigation of optical properties and the development of high-performance optoelectronics of perovskite materials.
Article
Nanoscience & Nanotechnology
Kaliappan Ramachandran, Chellamuthu Jeganathan, Karuppuchamy Subbian
Summary: A CuSCN/CuI nanocomposite was synthesized by single-step electrodeposition, with controlled surface morphology and film thickness. The nanoflower-like CuSCN/CuI morphology exhibited excellent photovoltaic performance in the device.