Статья

Interstitial Mn<sup>2+</sup>-Driven High-Aspect-Ratio Grain Growth for Low-Trap-Density Microcrystalline Films for Record Efficiency CsPbI<sub>2</sub>Br Solar Cells

Dongliang BaiKey Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, and School of Materials Science & Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of ChinaJingru ZhangKey Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, and School of Materials Science & Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of ChinaZhiwen JinKey Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, and School of Materials Science & Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of ChinaHui BianKey Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, and School of Materials Science & Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of ChinaKai WangKey Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, and School of Materials Science & Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of ChinaHaoran WangKey Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, and School of Materials Science & Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of ChinaLei LiangKey Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, and School of Materials Science & Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of ChinaQian WangKey Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, and School of Materials Science & Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of ChinaShengzhong LiuDalian National Laboratory for Clean Energy, and iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China

2018en

ABI

Аннотация

It is imperative to develop a large-aspect-ratio grain-based thin film with low trap density for high-performance inorganic perovskite CsPbI2Br solar cells. Herein, by using Mn2+ ion doping to modulate film growth, we achieved CsPbI2Br grains with aspect ratios as high as 8. It is found that Mn2+ ions insert into the interstices of the CsPbI2Br lattice during the growth process, leading to suppressed nucleation and a decreased growth rate. The combination aids in the achievement of larger CsPbI2Br crystalline grains for increased JSC values as high as 14.37 mA/cm2 and FFs as large as 80.0%. Moreover, excess Mn2+ ions passivate the grain boundary and surface defects, resulting in effectively decreased recombination loss with improved hole extraction efficiency, which enhances the built-in electric field and hence increases VOC to 1.172 V. As a result, the champion device achieves stabilized efficiency as high as 13.47%, improved by 13% compared with only 11.88% for the reference device.

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Идентификаторы

DOI: 10.1021/acsenergylett.8b00270

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar