CH_3NH_3PbI_3钙钛矿薄膜退火升温速率对其光伏性能的影响  

The effect of heating rate on photovoltaic performance of CH_3NH_3PbI_3 perovskite thin film under annealing process

作　　者：王成伟[1] 鄢建军[1] 李燕[1] 常崟 

机构地区：[1]西北师范大学物理与电子工程学院,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2016年第3期37-42,共6页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(11364036;11264034;11474231;11464041);甘肃省高校基本科研业务费资助项目

摘　　要：采用一种简便的两步连续沉积新工艺,成功制备出较纯相的CH_3NH_3PbI_3钙钛矿薄膜,考查了退火过程中升温速率对钙钛矿薄膜成膜质量及其与TiO_2薄膜形成平面异质结光伏性能的影响.结果表明,恰当选择升温速率对钙钛矿薄膜的形貌、致密性以及晶粒尺寸等参数的优化至关重要;当调控升温速率为3℃·min^(-1)时,可获得表面平整、平均晶粒尺寸较大、结构致密的钙钛矿薄膜.该薄膜具有明显改善光吸收特性和载流子抽取效率,进而使其组成的FTO/TiO_2/CH_3NH_3PbI_3/P3HT/Au钙钛矿平面异质结太阳能电池的光电转换效率提高至5.95%.Highly pure phase CH3 NH3 PbI3 perovskite thin films are successfully fabricated by an improved two‐step sequential deposition technique . The influence of different heating rate on photovoltaic performance of perovskite thin films for planar heterojunction with TiO2 films are particularly investigated under annealing process . The experimental results show that the heating rate for annealing process has a great influence on the surface morphology , grain size and compactness of perovskite films . At a moderate heating rate of 3 ℃ ？min-1 , high‐quality perovskite thin films with smoother surface morphology is obtained perfect compact structure and larger average grain size . T he high‐quality perovskite thin films have enhanced light absorption and higher charge carriers extraction efficiency , and are further assembled into planar heterojunction perovskite solar cells with FTO/TiO2/CH3 NH3 PbI3/P3HT/Au structure improving power conversion efficiency of 5.95% .

关 键 词：钙钛矿薄膜 升温速率 平面异质结 光伏性能 

分 类 号：O633.5[理学—高分子化学]