Stable and low-photovoltage-loss perovskite solar cells by multifunctional passivation,Nature Photonics

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Stable and low-photovoltage-loss perovskite solar cells by multifunctional passivation
Nature Photonics ( IF 35.0 ) Pub Date : 2021-07-05 , DOI: 10.1038/s41566-021-00829-4
Guang Yang _{1,

2} , Zhiwei Ren ₁ , Kuan Liu ₁ , Wanyuan Deng _{1,

3} , Hengkai Zhang ₁ , Qiong Liang ₁ , Gang Li _{1,

4} , Haibing Wang ₂ , Jiwei Liang ₂ , Feihong Ye ₂ , Yuanlin Zhuang ₂ , Jianbo Wang ₂ , Guojia Fang ₂ , Minchao Qin ₅ , Xinhui Lu ₅ , Hongbin Wu ₃ , Hang Yin ₆ , Shu Kong So ₆ , Yuxuan Chen ₇ , Xin Wang ₇ , Siqi Li _{8,

9} , Dangyuan Lei _{8,

9} , Bowei Gao ₁₀ , Jianhui Hou ₁₀ , Tingting Shi ₁₁ , Yang Yang ₁₂

Affiliation

Department of Electronic and Information Engineering, Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Hong Kong, China
Key Laboratory of Artificial Micro/Nano Structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan, China
Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, China
The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, China
Department of Physics, The Chinese University of Hong Kong, Hong Kong, China
Department of Physics and Institute of Advanced Materials, Hong Kong Baptist University, Hong Kong, China
South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, China
Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China
Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, China
Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, China
Department of Materials Science and Engineering and California NanoSystems Institute, University of California, Los Angeles, CA, USA

Metal halide perovskite solar cells have demonstrated a high power conversion efficiency (PCE), and further enhancement of the PCE requires a reduction of the bandgap-voltage offset (W_OC) and the non-radiative recombination photovoltage loss (ΔV_OC,nr). Here, we report an effective approach for reducing the photovoltage loss through the simultaneous passivation of internal bulk defects and dimensionally graded two-dimensional perovskite interface defects. Through this dimensionally graded perovskite formation approach, an open-circuit voltage (V_OC) of 1.24 V was obtained with a champion PCE of 21.54% in a 1.63 eV perovskite system (maximum V_OC = 1.25 V, W_OC = 0.38 V and ΔV_OC,nr = 0.10 V); we further decreased the W_OC to 0.326 V in a 1.53 eV perovskite system with a V_OC of 1.21 V and a PCE of 23.78% (certified 23.09%). This approach is equally effective in achieving a low W_OC (ΔV_OC,nr) in 1.56 eV and 1.73 eV perovskite solar cell systems, and further leads to the substantially improved operational stability of perovskite solar cells.

中文翻译：

通过多功能钝化获得稳定和低光电压损失的钙钛矿太阳能电池

金属卤化物钙钛矿太阳能电池已展示出高功率转换效率 (PCE)，而进一步提高 PCE 需要降低带隙电压偏移 ( W _OC ) 和非辐射复合光电压损失 (Δ V _OC,nr ) . 在这里，我们报告了一种通过同时钝化内部体缺陷和尺寸渐变的二维钙钛矿界面缺陷来降低光电压损失的有效方法。通过这种尺寸分级的钙钛矿形成方法，_在1.63 eV 钙钛矿系统（最大V _OC = 1.25 V ，W _OC = 0.38 V 和 Δ V _OC,nr = 0.10 V)；我们进一步将 1.53 eV 钙钛矿系统中的W _OC降低至 0.326 V，V _OC为 1.21 V，PCE 为 23.78%（认证为 23.09%）。这种方法在实现 1.56 eV 和 1.73 eV 钙钛矿太阳能电池系统中的低W _OC (Δ V _OC,nr )方面同样有效，并进一步显着提高了钙钛矿太阳能电池的运行稳定性。

更新日期：2021-07-05

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