Colloidal III-V Quantum Dot Photodiodes for Short-Wave Infrared Photodetection

被引：62

作者：

Leemans, Jari ^{[1
]}

Pejovic, Vladimir ^{[2
]}

Georgitzikis, Epimitheas ^{[2
]}

Minjauw, Matthias ^{[3
]}

Siddik, Abu Bakar ^{[2
]}

Deng, Yu-Hao ^{[1
]}

Kuang, Yinghuan ^{[2
]}

Roelkens, Gunther ^{[4
]}

Detavernier, Christophe ^{[3
]}

Lieberman, Itai ^{[2
]}

Malinowski, Pawel E. ^{[2
]}

Cheyns, David ^{[2
]}

Hens, Zeger ^{[1
]}

机构：

[1] Univ Ghent, Phys & Chem Nanostruct, Krijgslaan 281-S3, B-9000 Ghent, Belgium

[2] Imec Vzw, Kapeldreef 75, B-3001 Leuven, Belgium

[3] Univ Ghent, Dept Solid State Sci, Krijgslaan 281-S1, B-9000 Ghent, Belgium

[4] Univ Ghent, Photon Res Grp, Technol Pk Zwijnaarde 126, B-9052 Ghent, Belgium

来源：

ADVANCED SCIENCE | 2022年 / 9卷 / 17期

关键词：

InAs quantum dots; infrared sensing; printed photonics; SOLAR-CELLS; THIN-FILMS; NANOCRYSTALS; PROSPECTS; SURFACE;

D O I：

10.1002/advs.202200844

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Short-wave infrared (SWIR) image sensors based on colloidal quantum dots (QDs) are characterized by low cost, small pixel pitch, and spectral tunability. Adoption of QD-SWIR imagers is, however, hampered by a reliance on restricted elements such as Pb and Hg. Here, QD photodiodes, the central element of a QD image sensor, made from non-restricted In(As,P) QDs that operate at wavelengths up to 1400 nm are demonstrated. Three different In(As,P) QD batches that are made using a scalable, one-size-one-batch reaction and feature a band-edge absorption at 1140, 1270, and 1400 nm are implemented. These QDs are post-processed to obtain In(As,P) nanocolloids stabilized by short-chain ligands, from which semiconducting films of n-In(As,P) are formed through spincoating. For all three sizes, sandwiching such films between p-NiO as the hole transport layer and Nb:TiO2 as the electron transport layer yields In(As,P) QD photodiodes that exhibit best internal quantum efficiencies at the QD band gap of 46 +/- 5% and are sensitive for SWIR light up to 1400 nm.

引用

页数：8

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[1] Bringing colloidal quantum dots to detector technologies [J].