Semi-transparent, high-performance lead-free Cs3Bi2I9 single crystal self-driven photodetector
- 9 May 2022
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 120 (19), 191102
- https://doi.org/10.1063/5.0090569
Abstract
All-inorganic Bi-based perovskites have attracted much attention due to their excellent stability, environmentally friendly, and low-cost solution processability. However, due to the large exciton binding energy and small light absorption coefficient, the performance of the Bi-based perovskite photodetector (PD) is far behind of the traditional Pb-based perovskite PDs. In this work, the lead-free all-inorganic Cs3Bi2I9 (CBI) perovskite single crystal was synthesized by a space-confined antisolvent-assisted crystallization method for high-performance, semi-transparent, and self-driven PDs with an ITO/SnO2/CBI/PTAA/Au/ITO structure. Electrical and optical properties of Au/ITO transparent electrode were studied considering its figure of merit and device quantum efficiency through optimizing the Au thickness. Finally, our optimized semi-transparent device showed excellent self-driven performance with a large on/off ratio of ∼5700, a high responsivity of 52.06 mA/W, a high detectivity of >1012 Jones, and a large linear dynamic range of up to 140.7 dB. In addition, our device demonstrated excellent characteristics to the weak light detection and the long-term stability. The Au/ITO electrode was adopted and tailored to balance the device performance and transparency, which provides a good route for developing high-performance and transparent devices in the future.Funding Information
- National Natural Science Foundation of China (62074117)
- National Natural Science Foundation of China (12134010)
- National Natural Science Foundation of China (51972101)
- Shenzhen Fundamental Research Program (JCYJ20190808152609307)
This publication has 55 references indexed in Scilit:
- Band Gap Engineering of Cs3Bi2I9 Perovskites with Trivalent Atoms Using a Dual Metal CationThe Journal of Physical Chemistry C, 2016
- Defects in perovskite-halides and their effects in solar cellsNature Energy, 2016
- Determination of the exciton binding energy and effective masses for methylammonium and formamidinium lead tri-halide perovskite semiconductorsEnergy & Environmental Science, 2016
- Pushing efficiency limits for semitransparent perovskite solar cellsJournal of Materials Chemistry A, 2015
- Bismuth Based Hybrid Perovskites A3Bi2I9 (A: Methylammonium or Cesium) for Solar Cell ApplicationAdvanced Materials, 2015
- Direct measurement of the exciton binding energy and effective masses for charge carriers in organic–inorganic tri-halide perovskitesNature Physics, 2015
- Hybrid Germanium Iodide Perovskite Semiconductors: Active Lone Pairs, Structural Distortions, Direct and Indirect Energy Gaps, and Strong Nonlinear Optical PropertiesJournal of the American Chemical Society, 2015
- Lead-free organic–inorganic tin halide perovskites for photovoltaic applicationsEnergy & Environmental Science, 2014
- Nano-sized Ag-inserted amorphous ZnSnO3 multilayer electrodes for cost-efficient inverted organic solar cellsSolar Energy Materials and Solar Cells, 2011
- Transparent heat-mirror films of TiO2/Ag/TiO2 for solar energy collection and radiation insulationApplied Physics Letters, 1974