Proceedings of MATSUS23 & Sustainable Technology Forum València (STECH23) (MATSUS23)
Publication date: 22nd December 2022
Colloidal quantum dots (QDs) are considered as a rising candidate for new-generation electronics, due to their unique properties, such as tunable bandgap, narrow emission bandwidth, and cost-effective solution processing. However, ultrafast response and super bending resistance are still two obstacles which prohibit the application of colloidal QDs in real-time diagnosis, high-speed communication, and wearable devices. Here, we design ultrathin structure for colloidal QDs optoelectronic devices, which show the record 2.8 ns response time for ultrafast photodetection in PbS QDs system, super stability under 100,000 repetitive bending cycles in flexible devices, and the internal quantum efficiency of 100% at short-wave infrared (SWIR) region. Moreover, formation of high-quality PN junction and inhibition of capacitance effect in ultra-thin devices are also proposed in this work. This work demonstrates the ultra-high performance in ultra-thin devices, and shows this structure has the bright future in ultra-fast and ultra-bending resistance colloidal QDs optoelectronics.
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