Nuclear Techniques ›› 2016, Vol. 39 ›› Issue (6): 60104-060104.doi: 10.11889/j.0253-3219.2016.hjs.39.060104

• SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS • Previous Articles     Next Articles

Influences of substrate temperature on the structure of the perovskite films prepared using a vapor-assisted solution process

LIU Huaqiu1,2, ZHU Daming1,2, LIU Xing1,2, JI Gengwu1,2, YANG Yingguo1,3, WEN Wen1,3, GAO Xingyu1,3   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Zhangjiang Campus, Shanghai 201204, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Key Laboratory of Interfacial Physics and Technology, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2016-03-18 Revised:2016-04-18 Online:2016-06-10 Published:2016-06-12
  • Supported by:

    Supported by National Natural Science Foundation of China (No.11175239, No.11405253, No.11405257, No.U1332205), Science and Technology Commission of Shanghai Municipality (No.14DZ2261200)

Abstract:

Background: The crystallinity and morphology of perovskite thin film have decisive roles on its device performance in the perovskite solar cells. The perovskite thin film can be prepared using a vapor-assisted solution process, which needs to be thoroughly investigated to improve its crystallinity and morphology. Purpose: We attempt to study the influence of the substrate temperature on the crystallinity and morphology of perovskite thin film prepared using the vapor-assisted solution process. Methods: The perovskite thin films were prepared using a modified vapor-assisted solution process with different substrate temperatures, which were characterized by grazing incidence X-ray diffraction (GIXRD), UV-visible absorption spectrum, and scanning electron microscope (SEM). Results: GIXRD analysis shows that the perovskite thin film prepared via the vapor-assisted solution process with a low substrate temperature of 70℃ exhibits favorite crystallinity with better preferential crystalline orientation than those prepared at higher temperatures (100℃ and 125℃). UV-Visible absorption spectra show the optical absorption intensity of perovskite thin film prepared with a low substrate temperature of 70℃ is the largest. SEM results support the GIXRD results, which show the perovskite crystal size and the film morphology change dramatically with increasing substrate temperature. Conclusion: Based on the above results, the crystallinity, morphology and the optical absorption of perovskite thin film prepared using the modified vapor-assisted solution process are sensitive to the substrate temperature during the preparation. In general, a low substrate temperature in the modified vapor-assisted solution process is more desirable to prepare perovskite films with good crystallinity and high optical absorption.

Key words: GIXRD, Perovskite thin film, Modified vapor-assisted solution process, Substrate temperature

CLC Number: 

  • TL99