Balance of photon management and charge collection from carbon-quantum-dot layers as self-powered broadband photodetectors.

ABSTRACT: Semiconductor colloidal quantum dots (QDs) have been regarded as promising fluorescent materials for chemical sensing, bio-detection and optical communications; yet it still remains challenging to bring out self-powered photodetectors based solely on QDs because the excited charges within QDs are extremely immobile due to their reduced dimensionalities and they hardly form effective photocurrents. Hence, we have attempted to decouple the light-absorption and charge-transport criteria in order to feature highly-sensitive, rapid-response and self-driven photodetectors based on single-layer carbon QD layers (CQDLs) via facile in situ self-assembling deposition with fine control over thickness. We show explicit dark-current suppression by visualizing charge blocking phenomena and

SUBMITTER: Hsiao PH 

PROVIDER: S-EPMC9926880 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature