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Efficient and Stable Planar n-i-p Sb2Se3 Solar Cells Enabled by Oriented 1D Trigonal Selenium Structures.
Advanced Science ( IF 14.3 ) Pub Date : 2020-06-30 , DOI: 10.1002/advs.202001013 Kai Shen 1 , Yu Zhang 1 , Xiaoqing Wang 1 , Chizhu Ou 1 , Fei Guo 1 , Hongbing Zhu 1 , Cong Liu 1 , Yanyan Gao 1 , Ruud E I Schropp 1 , Zhiqiang Li 2 , Xianhu Liu 3 , Yaohua Mai 1
Advanced Science ( IF 14.3 ) Pub Date : 2020-06-30 , DOI: 10.1002/advs.202001013 Kai Shen 1 , Yu Zhang 1 , Xiaoqing Wang 1 , Chizhu Ou 1 , Fei Guo 1 , Hongbing Zhu 1 , Cong Liu 1 , Yanyan Gao 1 , Ruud E I Schropp 1 , Zhiqiang Li 2 , Xianhu Liu 3 , Yaohua Mai 1
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Environmentally benign and potentially cost‐effective Sb2Se3 solar cells have drawn much attention by continuously achieving new efficiency records. This article reports a compatible strategy to enhance the efficiency of planar n–i–p Sb2Se3 solar cells through Sb2Se3 surface modification and an architecture with oriented 1D van der Waals material, trigonal selenium (t‐Se). A seed layer assisted successive close spaced sublimation (CSS) is developed to fabricate highly crystalline Sb2Se3 absorbers. It is found that the Sb2Se3 absorber exhibits a Se‐deficient surface and negative surface band bending. Reactive Se is innovatively introduced to compensate the surface Se deficiency and form an (101) oriented 1D t‐Se interlayer. The p‐type t‐Se layer promotes a favored band alignment and band bending at the Sb2Se3/t‐Se interface, and functionally works as a surface passivation and hole transport material, which significantly suppresses interface recombination and enhances carrier extraction efficiency. An efficiency of 7.45% is obtained in a planar Sb2Se3 solar cell in superstrate n–i–p configuration, which is the highest efficiency for planar Sb2Se3 solar cells prepared by CSS. The all‐inorganic Sb2Se3 solar cell with t‐Se shows superb stability, retaining ≈98% of the initial efficiency after 40 days storage in open air without encapsulation.
中文翻译：
由定向一维三角硒结构实现的高效稳定的平面压区 Sb2Se3 太阳能电池。
环境友好且具有潜在成本效益的Sb 2 Se 3太阳能电池因不断创下新的效率记录而备受关注。本文报道了一种兼容策略，通过Sb 2 Se 3表面修饰和具有定向 1D 范德华材料、三方硒 (t-Se) 的结构来提高平面 n- i -p Sb 2 Se 3 太阳能电池的效率。开发了种子层辅助连续密间距升华（CSS）来制造高度结晶的Sb 2 Se 3吸收器。研究发现Sb 2 Se 3吸收体表现出缺硒表面和负表面能带弯曲。创新性地引入活性硒来补偿表面硒缺乏并形成（101）取向的一维t-Se中间层。p型t-Se层促进了Sb 2 Se 3 /t-Se界面上有利的能带排列和能带弯曲，并在功能上充当表面钝化和空穴传输材料，显着抑制界面复合并提高载流子提取效率。在Superstrate n-i-p配置的平面Sb 2 Se 3太阳能电池中获得了7.45%的效率，这是CSS制备的平面Sb 2 Se 3太阳能电池的最高效率。具有t-Se的全无机Sb 2 Se 3太阳能电池表现出极好的稳定性，在没有封装的情况下在露天储存40天后仍保持约98%的初始效率。
更新日期：2020-08-19
中文翻译：
由定向一维三角硒结构实现的高效稳定的平面压区 Sb2Se3 太阳能电池。
环境友好且具有潜在成本效益的Sb 2 Se 3太阳能电池因不断创下新的效率记录而备受关注。本文报道了一种兼容策略，通过Sb 2 Se 3表面修饰和具有定向 1D 范德华材料、三方硒 (t-Se) 的结构来提高平面 n- i -p Sb 2 Se 3 太阳能电池的效率。开发了种子层辅助连续密间距升华（CSS）来制造高度结晶的Sb 2 Se 3吸收器。研究发现Sb 2 Se 3吸收体表现出缺硒表面和负表面能带弯曲。创新性地引入活性硒来补偿表面硒缺乏并形成（101）取向的一维t-Se中间层。p型t-Se层促进了Sb 2 Se 3 /t-Se界面上有利的能带排列和能带弯曲，并在功能上充当表面钝化和空穴传输材料，显着抑制界面复合并提高载流子提取效率。在Superstrate n-i-p配置的平面Sb 2 Se 3太阳能电池中获得了7.45%的效率，这是CSS制备的平面Sb 2 Se 3太阳能电池的最高效率。具有t-Se的全无机Sb 2 Se 3太阳能电池表现出极好的稳定性，在没有封装的情况下在露天储存40天后仍保持约98%的初始效率。
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