Lead-Free CsBi3I10 Thin-Film flexible photodetectors with enhanced performance for broad spectral response.

[Display omitted] • CsBi 3 I 10 was introduced as a lead-free alternative for photodetectors. • High-quality thin film was deposited on flexible PET via hot solution spin-coating. • Exploring the wide spectral response from 290 nm UV to 650 nm visible. • Stability ensured performance post extensive light and bending cycles. • Photodetector showcased dynamic imaging capability at room temperature. By employing a hot spin-coating method, CsBi 3 I 10 thin-film photodetector was fabricated onto flexible PET substrate. The resulting nontoxic photodetector demonstrated exceptional optoelectronic performance, featuring an I light / I dark ratio of 1.8 × 103, a responsivity of 18.3 mA/W and a detectivity of 2.95 × 108 Jones. It also showed a broad spectral response and maintained consistent performance after 506 light switching cycles and 1000 bending cycles. The dynamic imaging capability of the device was further validated, illustrating its potential for diverse applications. This work pioneers the application of CsBi 3 I 10 perovskite thin-film in flexible photodetectors, offering a green, stable and high-performance solution for next-generation optoelectronic devices. [ABSTRACT FROM AUTHOR]