Determination of bandgaps of photoactive materials in perovskite solar cells at high temperatures by in-situ temperature-dependent resistance measurement
Author:
Affiliation:

Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education of China, Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China

Clc Number:

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    Normally, it is difficult to directly measure the bandgaps of perovskite based on methylammonium (MA) or formamidinium (FA) at high temperatures due to material decomposition. We prevent the decomposition by keeping the synthesized perovskite films (MAPbI3 and MAPbI3) in organic iodide vapors, then measure the in-situ resistance of the films at varied temperatures, and further evaluate the bandgaps of these two materials. The evaluated bandgaps are consistent with the results from ultraviolet-visible (UV-vis) absorption spectrum. The bandgap of MAPbI3 decreases with temperature above 95 °C, whereas that of FAPbI3 first increases with temperature from 95 °C to 107 °C and then decreases with temperature above 107 °C.

    Reference
    Related
    Cited by
Get Citation

ZHU Hao, ZHAO Zu-bin, CAO Huan-qi, YU Hao, LI Jin-zhao, CHEN Xiao-min, DONG Su-juan, YANG Li-ying, YIN Shou-gen. Determination of bandgaps of photoactive materials in perovskite solar cells at high temperatures by in-situ temperature-dependent resistance measurement[J]. Optoelectronics Letters,2016,12(5):337-339

Copy
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:
  • Revised:
  • Adopted:
  • Online: September 06,2016
  • Published: