title: Trap Engineering of CdTe Nanoparticle for High Gain, Fast Response, and Low Noise P3HT:CdTe Nanocomposite Photodetectors.
abstract: Cd(2+) causes deep traps on the surface of CdTe quantum dots (QDs) often leading to a long response time for a photodetector. Poly(3-hexylthiophene) (P3HT) can be used to selectively passivate the Cd(2+) -related deep traps by forming a Cd-S bond, while maintaining the shallow traps. By tailoring the trap depth of the CdTe QDs, a high gain, fast response, and low noise P3HT:CdTe nanocomposite photodetector is achieved.
authors.affiliation: Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln Lincoln, NE, 68588, USA.
authors.forename: Haotong
authors.initials: H
authors.lastname: Wei
authors.affiliation: Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln Lincoln, NE, 68588, USA.
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Fang
authors.affiliation: Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln Lincoln, NE, 68588, USA.
authors.forename: Yongbo
authors.initials: Y
authors.lastname: Yuan
authors.affiliation: Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln Lincoln, NE, 68588, USA.
authors.forename: Liang
authors.initials: L
authors.lastname: Shen
authors.affiliation: Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln Lincoln, NE, 68588, USA.
authors.forename: Jinsong
authors.initials: J
authors.lastname: Huang
keywords: noise; photoconductive gain; photodetectors; response speed; trap passivation