AI Article Synopsis
- - Double perovskite crystals, like CsAgBiCl and CsAgBiBr, offer safer alternatives to lead-based perovskites by improving toxicity and stability issues in photodiode applications.
- - The study created cesium silver bismuth halide nanocrystals using a hot-injection method, achieving bandgap engineering by altering halide compositions.
- - The CsAgBiBr photodiode demonstrates impressive performance with a detection peak at 340 nm, high responsivity, and fast response times, making it a promising option for efficient optoelectronic devices without lead.
Article Abstract
Double perovskite crystals are promising alternatives for lead-based perovskites that has potential to address toxicity and instability issues. In this study, CsAgBiClnanocrystals (NCs) with high absorption coefficients were synthesized by hot-injection method. The bandgap engineering was realized by tuning the halide composition in CsAgBiClto CsAgBiBr. Both NCs were used as light-absorbing layers in lead-free perovskite photodiodes that exhibit wavelength-selectivity for UV-visible light operatable even at a bias voltage of 0 V. CsAgBiBr-based photodiode exhibits a characteristic detection peak at 340 nm with a responsivity of 3.21 mA W, a specific detectivity up to 8.91 × 10Jones and a fast response speed with a rise/fall time of 30/35 ms. The excellent performance of self-driven photodiodes lights up the prospect of lead-free perovskite NCs in highly efficient optoelectronic devices.
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| http://dx.doi.org/10.1088/1361-6528/ad0303 | DOI Listing |
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