High-performance organic solar cell and self-power photodetector with chemically robust, near-infrared acceptor enabled by strengthening interfacial contact and compositional modulation

Shan，Chengwei1; Liu，Tao1; Zhou，Jialing2; He，Yang3; Luo，Dou1; Jiang，Zhengyan4; Wang，Zhaojin1; Liu，Qian1; Li，Chang'an1; Zhang，Fucai1; Zhou，Erjun2; Wang，Kai1; Kyaw，Aung Ko Ko1

2023-09-01

10.1016/j.cej.2023.144451

Chemical Engineering Journal   影响因子和分区

1385-8947

1873-3212

Non-fullerene acceptors (NFAs) have significantly contributed to the advancement of organic optoelectronic devices. However, their undesirable chemical reaction with adjacent interfacial layers and weak absorption in near infrared (NIR) region limit the further improvement of device performance. Herein, we employed chemically robust and NIR-responsive O6T-4F as NFA and enhanced the performance of both organic solar cells (OSCs) and organic photodetectors (OPDs) by interfacial engineering and compositional modulation. Bathocuproine cathode interfacial layer strengthens the interfacial contact due to the strong mechanical adhesion with active layer. Incorporating an appropriate content of PCBM in the active layer promotes the molecular ordering and tunes the orientation of O6T-4F from flat-on and edge-on lamellar crystalline to J-type π-π stacking, thereby extending the absorption spectrum from 950 nm to 1050 nm. Moreover, ternary blend film approaches intrinsic type semiconductor, achieving an extremely low dark current. As a result, the optimized OSCs achieve a power conversion efficiency of 13.23% while the corresponding self-powered OPDs render an impressive detectivity of 1.10 × 10 Jones at 840 nm and over 1.10 × 10 Jones in a wide wavelength range (330–1050 nm). Finally, we realized high-quality visible and NIR imaging with 80 × 260 pixels using the fabricated OPD. Our work demonstrates that combined strengthening interfacial contact and compositional modulation is an effective strategy to improve the performance of both OSCs and OPDs.

Cathode Interface layer Chemical stability Compositional Modulation Organic Photodetector Organic solar cells

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[62150610496];

Engineering

Engineering, Environmental ; Engineering, Chemical

WOS:001036972600001

ELSEVIER SCIENCE SA

20232814382377

Absorption spectroscopy ; Blending ; Cell engineering ; Conversion efficiency ; Heterojunctions ; Infrared devices ; Molecular orientation ; Organic solar cells ; Photodetectors ; Photons

Biomedical Engineering:461.1 ; Energy Conversion Issues:525.5 ; Solar Cells:702.3 ; Semiconductor Devices and Integrated Circuits:714.2 ; Chemistry:801 ; Chemical Operations:802.3 ; Mechanics:931.1 ; Atomic and Molecular Physics:931.3 ; Electronic Structure of Solids:933.3

ENGINEERING

2-s2.0-85164312655

Scopus

1.Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting,Department of Electronic & Electrical Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.National Center for Nanoscience and Technology,Beijing,100190,China
3.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
4.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Shan，Chengwei,Liu，Tao,Zhou，Jialing,et al. High-performance organic solar cell and self-power photodetector with chemically robust, near-infrared acceptor enabled by strengthening interfacial contact and compositional modulation[J]. Chemical Engineering Journal,2023,471.

Shan，Chengwei.,Liu，Tao.,Zhou，Jialing.,He，Yang.,Luo，Dou.,...&Kyaw，Aung Ko Ko.(2023).High-performance organic solar cell and self-power photodetector with chemically robust, near-infrared acceptor enabled by strengthening interfacial contact and compositional modulation.Chemical Engineering Journal,471.

Shan，Chengwei,et al."High-performance organic solar cell and self-power photodetector with chemically robust, near-infrared acceptor enabled by strengthening interfacial contact and compositional modulation".Chemical Engineering Journal 471(2023).