文章信息/Info

Title:

In-Situ Investigation of Perovskite CrystallizationBased on Synchrotron Radiation X-ray Scattering

文章編號:

1674-3962(2022)06-0413-10

作者:

王仕強; 李昊瑾; 趙奎

（陜西師范大學材料科學與工程學院，陜西 西安 710000）

Author(s):

WANG Shiqiang;  LI Haojin;  ZHAO Kui

(School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710000, China)

關鍵詞:

鈣鈦礦; 原位表征; 同步輻射掠入射廣角X射線散射(GIWAXS); 結晶動力學; 光電性質; 刮涂印刷

Keywords:

perovskites;  in-situ characterization;  grazing incidence wide-angle X-ray scattering（GIWAXS）;  crystallization dynamics;  photoelectric property;  blade coating

分類號:

TB34；TM914.4

DOI:

10.7502/j.issn.1674-3962.202110005

文獻標志碼:

A

摘要:

有機-無機雜化鈣鈦礦具有帶隙連續可調、可低成本溶液加工、電荷傳輸性能優異等優點，其太陽電池光電轉化效率在短短十年間已經超過25%。然而，目前人們對高品質鈣鈦礦薄膜制備過程中的結晶行為認識不足，高質量晶體可控制備存在巨大挑戰，阻礙了鈣鈦礦光伏的產業化發展。基于同步輻射X射線散射技術，作者團隊系統地研究了三維有機�矡o機雜化鈣鈦礦MAPbI3和FAPbI3、二維有機-無機雜化鈣鈦礦Ruddlesden-Popper(RP)型(BA)2(MA)3Pb4I13和層間陽離子交替(ACI)型(GA)(MA)3Pb3I10、以及全無機鈣鈦礦CsPbI2Br 5種體系的成膜結晶動力學過程，揭示了鈣鈦礦結晶原位生長過程的相變機制和各種相的演變動力學，對相應的觀測方法、研究成果進行了總結評述，希望促進鈣鈦礦結晶動力學機制方面的原創性研究，推動鈣鈦礦光電技術的發展。

Abstract:

Hybrid organic-inorganic halide perovskites have attracted paramount interest due to their adjustable band gap, solution processibility for solar cells and excellent optoelectronic properties, and its solar cells power conversion efficiencies have reached higher than 25%. In this brief review, we provide a brief overview of phase transformation and conversion for different kinds of hybrid perovskites as revealed through in-situ grazing incidence wide-angle X-ray scattering（GIWAXS） technique. These experiments were performed in conditions closely mimicking thin film processing and conditions used for thin film solar cell device fabrication, therefore have provided critical information about the mechanism of the phase transformation, its onset, kinetics, as well as the emergence and disappearance of various phases along hybrid perovskite film formation. These measurements capture the overall solidification and conversion process of hybrid perovskite inks into solid films, all of which deeply affect the thin film microstructure and morphology. This paper may be helpful for designing and fabricating high performance perovskite optoelectronics.