Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 16, Pages 18769-18776Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c01202
Keywords
Lead-free perovskites; Photodetectors; Photogating; Organic semiconductors; Heterojunction
Funding
- Research Grants Council (RGC) of Hong Kong, China [PolyU 152087/17E]
- Hong Kong Polytechnic University [1-ZVGH]
Ask authors/readers for more resources
In recent years, photodetectors based on organicinorganic lead halide perovskites have been studied extensively. However, the inclusion of lead in those materials can cause severe human health and environmental problems, which is undesirable for practical applications. Here, we report high-performance photodetectors with a tin-based perovskite/PEDOT:PSS vertical heterojunction. The device demonstrates a broadband photoresponse from NIR to UV. The maximum responsivity and gain are up to 2.6 x 10(6) A/W and 4.7 x 10(6), respectively. Moreover, a much shorter response time and higher detectivity can be achieved by reducing the thickness of PEDOT:PSS. The outstanding performance is due to the excellent optoelectronic properties of the perovskite and the photogating effect originating from the heterojunction. Furthermore, devices fabricated on flexible substrates can demonstrate not only high sensitivity but also excellent bending stability. This work opens up the opportunity of using lead-free perovskite in highly sensitive photodetectors with vertical heterojunctions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available