热气流辅助结晶空气中制备高效钙钛矿太阳能电池

Hot-flow-assisted fully air-processed for highly efficient perovskite solar cells

实现钙钛矿太阳能电池(PSCs)低成本及大面积制备是当前相关领域的研究焦点.目前钙钛矿薄膜通常是在惰性气体环境中使用传统的旋涂工艺制备,这种工艺需要复杂的设备及严苛的环境,增加了器件制造成本,阻碍了PSCs的产业化生产.该文提出一种热气流辅助结晶方法在空气中制备钙钛矿薄膜.这种方法工艺简单、环境容忍度高,可有效降低PSCs的制备成本,实现PSCs大面积制备.另外,探究了基底预热对钙钛矿薄膜生长的影响规律,研究发现基底在适宜温度下预热不仅能促进钙钛矿薄膜均匀结晶,而且可以抑制不利的相变,通过该方法制备的钙钛矿薄膜具有更好的稳定性和更优的光伏性能.基于此方法制备的PSCs光电转换效率高达16.45%,且重现性好.该方法为空气中制备PSCs提供了一种新的可行性,为太阳能电池的商业化进行了初步探索.

Low cost and large area preparation of perovskite solar cells(PSCs)is the focus of current research.Currently,perovskite films are usually prepared by traditional spin-coating method in a glove box with inert or dry air atmosphere,which requires complex equipment and harsh environment,increasing the cost of device manufacturing and hindering the industrial production of PSCs.In this paper,we proposed a hot-flow-assisted crystallization method to prepare perovskite films in air.This method has a simple process and high environmental tolerance,which can effectively reduce the preparation cost of PSCs and realize the large area preparation of PSCs.In addition,we also explored the influence of substrate preheating on the growth of perovskite films.It was found that substrate preheating at appropriate temperature can not only promote the uniform crystallization of perovskite films,but also inhibit the adverse phase transformation.The perovskite films prepared by this method have better stability and photovoltaic performance.The efficiency of PSCs prepared by this method is up to 16.45%,and the reproducibility is excellent.This method provides a new feasible approach for the preparation of PSCs in air,and it's a preliminary exploration for the commercialization of solar cells.