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Trap Engineering of CdTe Nanoparticle for High Gain, Fast Response, and Low Noise P3HT:CdTe Nanocomposite
Haotong Wei1, Yanjun Fang1, Yongbo Yuan1
1Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln Lincoln, NE, 68588, USA.
Advanced Materials (Deerfield Beach, Fla.)
|July 21, 2015
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.
