Gao Feng, Liu Ke, Cheng Ruzhou, Zhou Xi, Deng Xiaoting, Yin Shaofeng, Jiang Shu
College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, People's Republic of China.
ACS Omega. 2021 May 7;6(19):12858-12865. doi: 10.1021/acsomega.1c01260. eCollection 2021 May 18.
For the study, we prepared a low grain boundary three-dimensional CHNHPbI crystal (3D-MAPbI) on TiO nanoarrays by inhibition of ammonium iodide and discussed the formation mechanism of the crystal. Based on the 3D-MAPbI crystal, solar cells showed modified performance with a power conversion efficiency (PCE) of up to 19.3%, which increases by 36.8% in contrast to the counterparts. We studied the internal photocurrent conversion process. The highest external quantum efficiency is up to 92%, and the electron injection efficiency is remarkably facilitated where the injection time decreases by 37.8% compared to the control group. In addition, based on 3D-MAPbI, solar cells showed excellent air stability, which possesses 78.3% of the initial PCE, even though they were exposed to air for 30 days. Our results demonstrate a promising approach for the fabrication of perovskite solar cells with high efficiency and stability.
在本研究中，我们通过抑制碘化铵在TiO纳米阵列上制备了低晶界三维CHNHPbI晶体（3D-MAPbI），并探讨了该晶体的形成机制。基于3D-MAPbI晶体的太阳能电池表现出改进的性能，功率转换效率（PCE）高达19.3%，与同类产品相比提高了36.8%。我们研究了内部光电流转换过程。最高外部量子效率高达92%，电子注入效率显著提高，与对照组相比，注入时间减少了37.8%。此外，基于3D-MAPbI的太阳能电池表现出优异的空气稳定性，即使暴露在空气中30天，仍保持初始PCE的78.3%。我们的结果展示了一种制备具有高效率和稳定性的钙钛矿太阳能电池的有前景的方法。
