The Effects of Temperature on the Growth of a Lead-Free Perovskite-Like (CH3NH3)3Sb2Br9 Single Crystal for An MSM Photodetector Application

Sensors

Chien-Min Hun¹  Ching-Ho Tien¹  Kuan-Lin Lee¹  Lung-Chien Chen¹  Hong-Ye Lai¹ 

[1] Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan;

关键词: lead-free perovskite;    MA₃Sb₂Br₉;    perovskite single crystal;    perovskite photodetector;   

DOI  :  10.3390/s21134475

来源: DOAJ

【 摘 要 】

We have fabricated a photodetector based on (CH₃NH₃)₃Sb₂Br₉ (MA₃Sb₂Br₉) lead-free perovskite-like single crystal, which plays an important role in the optoelectronic characteristics of the photodetector as a perovskite-like photosensitive layer. Here, MA₃Sb₂Br₉ single crystals were synthesized by an inverse temperature crystallization process with a precursor solution at three different growth temperatures, 60 °C, 80 °C, and 100 °C. As a result, a MA₃Sb₂Br₉ single crystal with an optimum growth temperature of 60 °C presented a low trap density of 2.63 × 10¹¹ cm⁻³, a high charge carrier mobility of 0.75 cm² V⁻¹ s⁻¹, and excellent crystal structure and optical absorption properties. This MA₃Sb₂Br₉ perovskite-like photodetector displayed a low dark current of 8.09 × 10⁻⁹ A, high responsivity of 0.113 A W⁻¹, and high detectivity of 4.32 × 10¹¹ Jones.

【 授权许可】

Unknown