TY - JOUR
T1 - 2D Cs
2
AgBiBr
6
with Boosted Light–Matter Interaction for High-Performance Photodetectors
AU - Fang, Feier
AU - Li, Henan
AU - Fang, Shaofan
AU - Zhou, Bo
AU - Huang, Fu
AU - Ma, Chun
AU - Wan, Yi
AU - Jiang, Shangchi
AU - Wang, Ye
AU - Tian, Bingbing
AU - Shi, Yumeng
N1 - KAUST Repository Item: Exported on 2021-11-21
Acknowledgements: Y.S. acknowledges the support from the National Natural Science Foundation of China (grant no. 61874074), Science and Technology Project of Shenzhen (JCYJ20170817101100705), and the (Key) Project of Department of Education of Guangdong Province (grant no. 2016KZDXM008). H.L. acknowledges the support from Natural Science Foundation of SZU (grant no. 2017011) and the support from Science and Technology Project of Shenzhen (JCYJ20170817100111548). This project was supported by Shenzhen Peacock Plan (grant no. KQTD2016053112042971) and the postgraduate innovation development fund project of Shenzhen University (grant no. 315-0000470527).
PY - 2021/2/16
Y1 - 2021/2/16
N2 - Lead-free double perovskite Cs2AgBiBr6 has attracted significant research interests for optoelectronic applications because of its nontoxicity, inherent stability, and high detection sensitivity. In this work, the 2D Cs2AgBiBr6 with a thickness of ≈5 nm and lateral length larger than 50 µm is successfully fabricated by a space-confined method. The fabricated ultra-thin 2D Cs2AgBiBr6 exhibits significant advantages on photodetection, due to its enhanced light–matter interaction. Remarkably, compared with bulk Cs2AgBiBr6, 2D Cs2AgBiBr6-based photodetectors exhibit dramatically improved optoelectronic properties including ultra-high detectivity (D*) of 7.4 × 1014 Jones (more than ten times), photoresponsivity (R) of 54.6 A W−1 (exceeding 4.7 times), an on/off ratio of 7.4 × 104 (more than ten times), and a fast response time of ≈1.7 ms (exceeding 30 times). In addition, due to the strong photon recycling effect of Cs2AgBiBr6, optical properties in both light absorption and emission can be effectively engineered by the material thickness, which enables a tunable wavelength-dependent photodetection. The results provide further insights on the light–matter interaction of environmentally friendly 2D perovskites related materials and shine light on their high-performance optoelectrical applications.
AB - Lead-free double perovskite Cs2AgBiBr6 has attracted significant research interests for optoelectronic applications because of its nontoxicity, inherent stability, and high detection sensitivity. In this work, the 2D Cs2AgBiBr6 with a thickness of ≈5 nm and lateral length larger than 50 µm is successfully fabricated by a space-confined method. The fabricated ultra-thin 2D Cs2AgBiBr6 exhibits significant advantages on photodetection, due to its enhanced light–matter interaction. Remarkably, compared with bulk Cs2AgBiBr6, 2D Cs2AgBiBr6-based photodetectors exhibit dramatically improved optoelectronic properties including ultra-high detectivity (D*) of 7.4 × 1014 Jones (more than ten times), photoresponsivity (R) of 54.6 A W−1 (exceeding 4.7 times), an on/off ratio of 7.4 × 104 (more than ten times), and a fast response time of ≈1.7 ms (exceeding 30 times). In addition, due to the strong photon recycling effect of Cs2AgBiBr6, optical properties in both light absorption and emission can be effectively engineered by the material thickness, which enables a tunable wavelength-dependent photodetection. The results provide further insights on the light–matter interaction of environmentally friendly 2D perovskites related materials and shine light on their high-performance optoelectrical applications.
UR - http://hdl.handle.net/10754/667521
UR - https://onlinelibrary.wiley.com/doi/10.1002/adom.202001930
UR - http://www.scopus.com/inward/record.url?scp=85101436930&partnerID=8YFLogxK
U2 - 10.1002/adom.202001930
DO - 10.1002/adom.202001930
M3 - Article
SN - 2195-1071
VL - 9
SP - 2001930
JO - Advanced Optical Materials
JF - Advanced Optical Materials
IS - 9
ER -