A Highly Stable Photodetector Based on a Lead-Free Double Perovskite Operating at Different Temperatures.

The Journal of Physical Chemistry Letters
Hao LiXuhui Xu

Abstract

In recent years, considerable breakthroughs have been achieved in the explored photodetectors with improved performance and stability. However, such devices suffer from the drifting parameters (photoresponsivity, response time, and specific detectivity) in the case of evident operating temperature changes. Here, a double perovskite Cs2NaBiCl6-based ultraviolet (UV) photodetector is developed free from thermal disturbance, exhibiting a steady photoresponsivity (≈ 67.98 mA/W) and response time (≈ 16.42 ms) within a wide temperature range (from 273 to 333 K). Further studies demonstrate that the stability of the crystal structure endows the superior photodetection capability. This result unambiguously highlights the great potential of such double perovskite Cs2NaBiCl6 compound as an environmentally friendly alternative for UV photodetectors.

References

Dec 15, 1994·Physical Review. B, Condensed Matter·P E Blöchl
Aug 12, 2015·The Journal of Physical Chemistry Letters·Yunlong GuoEiichi Nakamura
Feb 9, 2016·Journal of the American Chemical Society·Adam H SlavneyHemamala I Karunadasa
Feb 26, 2016·Nature Materials·Aslihan BabayigitBert Conings
Jun 21, 2016·The Journal of Physical Chemistry Letters·Marina R FilipFeliciano Giustino
Jan 24, 2017·Journal of the American Chemical Society·Xin-Gang ZhaoLijun Zhang
May 24, 2018·The Journal of Physical Chemistry Letters·Bin YangKe-Li Han
Oct 31, 2019·Accounts of Chemical Research·Bin Yang, Keli Han

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