A skin-like two-dimensionally pixelized full-color quantum dot photodetector.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 31803836.
- Also identified by DOI 10.1126/sciadv.aax8801 and PMC identifier 6874493.
- Licence recorded as CC BY-NC.
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Abstract
Direct full-color photodetectors without sophisticated color filters and interferometric optics have attracted considerable attention for widespread applications. However, difficulties of combining various multispectral semiconductors and improving photon transfer efficiency for high-performance optoelectronic devices have impeded the translation of these platforms into practical realization. Here, we report a low-temperature (<150°C) fabricated two-dimensionally pixelized full-color photodetector by using monolithic integration of various-sized colloidal quantum dots (QDs) and amorphous indium-gallium-zinc-oxide semiconductors. By introducing trap-reduced chelating chalcometallate ligands, highly efficient charge carrier transport and photoresistor-free fine-patterning of QD layers were successfully realized, exhibiting extremely high photodetectivity (>4.2 × 10<sup>17</sup> Jones) and photoresponsivity (>8.3 × 10<sup>3</sup> A W<sup>-1</sup>) in a broad range of wavelengths (365 to 1310 nm). On the basis of these technologies, a wavelength discriminable phototransistor circuit array (>600 phototransistors) was implemented on a skin-like soft platform, which is expected to be a versatile and scalable approach for wide spectral image sensors and human-oriented biological devices.