【摘要】 有机-无机杂化钙钛矿太阳电池的研究发展迅速,然而其稳定性差,提高其稳定性一直是该领域的研究难点。影响稳定性的主要因素包括水、氧、光照、热等,其中水、氧可通过有效的封装技术加以隔绝,而获得光照稳定性的方法仍需要深入探索。本研究通过电学、光学等测试方法研究了光照对MAPb I₃器件稳定性的影响。通过热导纳谱（TAS）、电容-电压（C-V）、X射线光电子能谱（XPS）等分析发现,光照老化器件内部会增加由碘离子空位V_I和Pb-I反位缺陷I_Pb导致的深能级缺陷态。这些缺陷态使载流子的复合加强,造成能量损失,致使开路电压在低光照强度下衰减更加严重。本工作对比研究了FA_0.85MA_0.15Pb(I_0.85Br_0.15)₃器件的光照稳定性,由瞬态光电压（TPV）测试结果发现,FA离子和Br离子可以减少载流子复合。本研究结果为提高电池的光照稳定性提供了新的研究思路。更多还原

【Abstract】 The research on organic-inorganic hybrid perovskite solar cells has advanced rapidly.However,it holds poor stability,and it is a great challenge to improve its stability in this research field.The main factors that influence the device stability include moisture,oxygen,light and heat.Generally,the effective encapsulation technology is capable of preventing the devices from contacting moisture and oxygen.In-depth exploration still should be carried out to achieve the light stability of the cells.Herein,we studied the effect of light on the stability of MAPb I₃devices by means of electronic and optical characterization methods.According to the results of thermal admittance spectroscopy（TAS）,capacitance-vol-tage（C-V）and X-ray photoelectron spectroscopy（XPS）,we found increased deep level defect states induced by iodide vacancies and I_Pbantisite in aging perovskite films.These defect states can induce non-radiative recombination,which ultimately cause large energy loss and decrease in the open circuit voltage at low light intensity.In addition,we conducted comparative study of FA_0.85MA_0.15Pb(I_0.85Br_0.15)₃devices and MAPb I₃devices in light stability.The results of transient photovoltage（TPV）test indicated that the FA and Br ions could reduce the carriers recombination.This work provides a new understanding to improve the light stability of perovskite solar cells.更多还原