Ren Xiaodong, Yang Zhou, Yang Dong, Zhang Xu, Cui Dong, Liu Yucheng, Wei Qingbo, Fan Haibo, Liu Shengzhong Frank
Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education; Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710119, China.
Nanoscale. 2016 Feb 14;8(6):3816-22. doi: 10.1039/c5nr08935b. Epub 2016 Jan 27.
Regulating the temperature during the direction contact and intercalation process (DCIP) for the transition from PbI2 to CH3NH3PbI3 modulated the crystallinity, crystal grain size and crystal grain orientation of the perovskite films. Higher temperatures produced perovskite films with better crystallinity, larger grain size, and better photovoltaic performance. The best cell, which had a PCE of 12.9%, was obtained on a film prepared at 200 °C. Further open circuit voltage decay and film resistance characterization revealed that the larger grain size contributed to longer carrier lifetime and smaller carrier transport resistance, both of which are beneficial for solar cell devices.
在从PbI2到CH3NH3PbI3的定向接触和插层过程（DCIP）中调节温度，可调控钙钛矿薄膜的结晶度、晶粒尺寸和晶粒取向。较高温度下制备的钙钛矿薄膜具有更好的结晶度、更大的晶粒尺寸和更好的光伏性能。在200°C制备的薄膜上获得了最佳电池，其光电转换效率（PCE）为12.9%。进一步的开路电压衰减和薄膜电阻表征表明，较大的晶粒尺寸有助于延长载流子寿命并降低载流子传输电阻，这两者都有利于太阳能电池器件。
