摘要
光伏热致变色智能窗采用钙钛矿材料并结合其热致变色和光伏特性,既可调控不同温度下的太阳光透过率,又可将吸收的光能转化为可用的电能.在此,我们利用经过优化的后退火工艺设计了一个结构为氟掺杂氧化锡(FTO)/SnO_(2)/CsPbIBr_(2)/NiO_(x)/铟锡氧化物(ITO)的半透明太阳能电池,在最佳条件下其平均可见光透过率为33.2%,光电转化效率为3.89%.同时,基于CsPbIBr_(2)的热致变色特性,我们发现当其由高温着色相转变为低温透明相时,器件的平均可见透过率可从33.2%提高至73.5%.此外,高温相向低温相的转变受湿度主导.当相对湿度从50%上升至90%时,钙钛矿相变时间从1005分钟大幅度下降至17分钟.然而,过高的湿度导致的过快相变会破坏钙钛矿的薄膜形貌和晶体结构,这将对CsPbIBr_(2)钙钛矿造成不可逆损伤.这项工作为半透明光伏和热致变色智能窗的应用提供了重要参考,并可预见这一领域将进一步助力降低建筑和汽车能耗.
The photovoltaic thermochromic smart window,which combines perovskite with thermochromic and photovoltaic properties,can not only control the solar transmittance at different temperatures,but also convert the absorbed light energy into usable electric energy.Herein,we designed a fluoride-doped tin oxide(FTO)/SnO_(2)/CsPbIBr_(2)/NiO_(x)/indium tin oxide(ITO)semitransparent solar cell structure by using the optimized post-annealing process and obtained an average visible transmittance(AVT)of 33.2%and a power conversion efficiency of 3.89%under the optimal conditions.Meanwhile,based on the thermochromic properties of CsPbIBr_(2),it was found that the AVT of the device improved from 33.2%to 73.5%when CsPbIBr_(2)converted from the colored high-temperature phase to the transparent low-temperature phase.Besides,the transition from high-temperature phase to lowtemperature phase is humidity-dominated.When the relative humidity rises from 50%to 90%,the phase transition time of perovskite decreases substantially from 1005 to 17 min.However,the excessively fast phase transition caused by high humidity will destroy the thin film morphology and crystal structure of perovskite,causing irreversible damage to CsPbIBr_(2)perovskite.This work is promising for the application of semitransparent photovoltaic and thermochromic smart window,which represents an attractive prospect in further reducing the energy consumption of buildings and automobiles.
作者
葛锐
赵亚洁
江成玉
郑捷元
陈莉蓉
郑洋
徐刚
肖秀娣
Rui Ge;Yajie Zhao;Chengyu Jiang;Jieyuan Zheng;Lirong Chen;Yang Zheng;Gang Xu;Xiudi Xiao(Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development,Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;School of Energy Science and Engineering,University of Science and Technology of China,Hefei 230026,China;University of Chinese Academy of Sciences,Beijing 100049,China;State Key Laboratory of Luminescent Materials and Devices,South China University of Technology,Guangzhou 510640,China)
基金
supported by the Key R&D program of Guangzhou(202007020004)
the Natural Science Foundation of Guangdong Province(2018A0303130146)
the Project of Science and Technology of Guangzhou(201904010171)
the Open Fund of State Key Laboratory of Luminescent Materials and Devices(2023-skllmd-05).
