High-Performance Inorganic Perovskite Quantum Dot-Organic Semiconductor Hybrid Phototransistors.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 29027731.
- Also identified by DOI 10.1002/adma.201704062.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
All-inorganic lead halide perovskite quantum dots (IHP QDs) have great potentials in photodetectors. However, the photoresponsivity is limited by the low charge transport efficiency of the IHP QD layers. High-performance phototransistors based on IHP QDs hybridized with organic semiconductors (OSCs) are developed. The smooth surface of IHP QD layers ensures ordered packing of the OSC molecules above them. The OSCs significantly improve the transportation of the photoexcited charges, and the gate effect of the transistor structure significantly enhances the photoresponsivity while simultaneously maintaining high I<sub>photo</sub> /I<sub>dark</sub> ratio. The devices exhibit outstanding optoelectronic properties in terms of photoresponsivity (1.7 × 10<sup>4</sup> A W<sup>-1</sup> ), detectivity (2.0 × 10<sup>14</sup> Jones), external quantum efficiency (67000%), I<sub>photo</sub> /I<sub>dark</sub> ratio (8.1 × 10<sup>4</sup> ), and stability (100 d in air). The overall performances of our devices are superior to state-of-the-art IHP photodetectors. The strategy utilized here is general and can be easily applied to many other perovskite photodetectors.