A skin-like two-dimensionally pixelized full-color quantum dot photodetector

Jaehyun Kim, Sung Min Kwon, Yeo Kyung Kang, Yong Hoon Kim, Myung Jae Lee, Kwangjoon Han, Antonio Facchetti, Myung Gil Kim, Sung Kyu Park

Research output: Contribution to journalArticlepeer-review

117 Scopus citations

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 lowerature (<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 × 1017 Jones) and photoresponsivity (>8.3 × 103 A W-1) 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.

Original languageEnglish
Article numbereaax8801
JournalScience advances
Volume5
Issue number11
DOIs
StatePublished - 22 Nov 2019

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