准二维钙钛矿太阳能电池的研究进展

目前,钙钛矿太阳能电池的光电转换效率已超过25％,飞速提升的效率使得人们越来越期待商业化的应用,但钙钛矿材料的稳定性问题却是其商业化所面临的最大挑战,准二维钙钛矿有望解决这一问题.利用大的有机间隔阳离子的疏水性和热稳定性,以及更高的晶体形成能和更加稳固的结构,准二维钙钛矿能够有效提高钙钛矿的稳定性.此外,准二维钙钛矿对...

Research progress of quasi-two-dimensional perovskite solar cells

At present,the power conversion efficiency of perovskite solar cells exceeds 25%.Their rapidly increasing efficiency has made people increasingly optimistic about their commercial application,but the stability of perovskite remains the biggest obstacle to successful commercialization.Quasi-two-dimensional perovskite solves this problem.Utilizing the hydrophobicity and thermal stability of large organic spacer cations,quasi-two-dimensional perovskite can effectively improve the stability of perovskite and improved crystal formation energy while providing a more stable structure.Quasi-two-dimensional perovskite also invites significant improvement to the morphology of perovskite films,which can replace anti-solvent processes,simplify production,and meet the industrial production requirements of perovskite.However,the relatively large band-gap and low carrier mobility caused by insulated organic spacer cations hinder ion transmission,causing quasi-two-dimensional perovskite solar cells to be far less efficient than three-dimensional perovskite solar cells.Therefore,for quasi-two-dimensional perovskite,it is necessary to further study its characteristics and device applications to achieve further optimization of device performance.This article summarizes the research progress of quasi-two-dimensional perovskite solar cells,the molecular structure of quasi-two-dimensional perovskite,the methods and principles of quasi-two-dimensional doping that improves the stability of three-dimensional perovskite,and the phase distribution and carrier transport characteristics of quasitwo-dimensional perovskite.Then this paper analyzes the problems faced by quasi-two-dimensional perovskite solar cells and looks forward to their prospects.It is expected that it will provide a reference for the preparation of efficient and stable quasi-two-dimensional perovskite solar cells.