Optimization of the response spectra of organic photodetectors based on P3HT:PC{sub 61}BM using PCPDTBT as the third component

Journal Article · Wed Jan 15 04:00:00 EST 2020 · Optical and Quantum Electronics

DOI:https://doi.org/10.1007/S11082-019-2123-2· OSTI ID:22950030

An, Tao; Wang, Yongqiang; Xue, Jiawei ^[1]

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1. Xi’an University of Technology, Department of Electronic Engineering (China)

In this work, we report a new method for extending the response spectra of organic photodetectors (OPDs) by incorporating PCPDTBT in the P3HT:PC{sub 61}BM. The effects of PCPDTBT incorporation on the optical and electrical properties of OPDs were investigated, It was found that when the mass ratio of P3HT:PCPDTBT:PC{sub 61}BM was 8:2:10, the response spectrum of the active layer was extended to 840 nm. The responsivity (R) and external quantum efficiency of the OPDs reached 229, 278, 249 mA/W and 48%, 65%, 68% under 630, 530, and 460 nm illumination and − 1 V bias, respectively, and the detectivity (D{sup *}) reached 10{sup 12} Jones. The results show that highly ordered polymer PCPDTBT with appropriate mass ratio can increases the exciton generation in P3HT:PC{sub 61}BM, which increases the photocurrent of the device. In addition, the addition of PCPDTBT promotes the crystallization of the film, reduces the density of trap defects in the film, and reduces the dark current of the device. Graphic abstract: .

• OSTI ID: 22950030
• Journal Information: Optical and Quantum Electronics, Journal Name: Optical and Quantum Electronics Journal Issue: 1 Vol. 52; ISSN OQELDI; ISSN 0306-8919
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
CRYSTALLIZATION
DARK CURRENT
DEFECTS
ELECTRICAL PROPERTIES
EQUIPMENT
FILMS
HETEROJUNCTIONS
ILLUMINANCE
LAYERS
OPTIMIZATION
PHOTOCURRENTS
PHOTODETECTORS
POLYMERS
QUANTUM EFFICIENCY
SPECTRA