Temperature-assisted controlling morphology and charge transport property for highly efficient perovskite solar cells
Temperature-assisted controlling morphology and charge transport property for highly efficient perovskite solar cells
复制标题
温度辅助控制高效钙钛矿太阳能电池的形貌和电荷传输特性
DOI：
10.1016/j.nanoen.2015.04.039
复制
发表时间：
2015
期刊：
影响因子：
17.6
通讯作者：
Meng Qingbo
中科院分区：
文献类型：
--
作者：
Zhu Lifeng;Shi Jiangjian;Lv Songtao;Yang Yueyong;Xu Xin;Xu Yuzhuan;Xiao Junyan;Wu Huijue;Luo Yanhong;Li Dongmei;Meng Qingbo
采用两步溶液沉积法制备了CH3NH3PbI3吸收剂，并将反应温度作为一个关键参数来控制薄膜的沉积。结果表明，提高反应温度可显著缩短CH_3NH_3PbI_3致密层的转化时间。CH_3NH_3PbI_3晶粒尺寸随反应温度的升高而增大，表面粗糙度增大。在较高温度下沉积的CH3NH3PbI3薄膜具有更好的电荷传输能力、更大的内建异质结场和更弱的电荷复合，从而提高了太阳能电池的性能。通过优化反应温度，介观和平面钙钛矿太阳能电池的功率转换效率分别高达17.40%和14.02%。
Reaction temperature as a key parameter has been introduced to manipulate the film deposition of the CH3NH3PbI3absorber fabricated by the two-step solution deposition method. It is found that conversion time of dense CH3NH3PbI3layer can be significantly reduced by raising reaction temperature. CH3NH3PbI3crystal grain sizes increase with reaction temperature increasing, resulting in rougher surface. CH3NH3PbI3films deposited at higher temperatures exhibit better charge transport ability, larger built-in heterojunction field and weaker charge recombination, leading to enhanced solar cell performance. By optimizing reaction temperatures, as high as 17.40% and 14.02% of power conversion efficiencies of the mesoscopic and planar perovskite solar cells have been achieved, respectively.