Intrinsic polarization-sensitive organic photodetector with self-assembled all-polymer heterojunction
Journal article, 2022
Intrinsic polarization-sensitive photodetectors (IPPDs) have attracted considerable attention in recent years due to their simplicity in configuration, making them ideal candidates for compact and integrated polarization-sensitive sensing and imaging systems. Photoactive films with intrinsic optical anisotropy are necessary for IPPDs. This study reports an achievement of photoactive films based on all-polymer heterojunction films with in-plane optical anisotropy using a simple bottom-up self-assembly method. Both the donor (TQ1) and acceptor (N2200) polymers have the same spatial orientation with distinct anisotropy, approaching a dichroic ratio (DR) of 8. Polarization-sensitive light absorption is due to the uniaxially oriented polymer chains, which are dominated by lamellar packing with edge-on orientation. For IPPDs based on this anisotropic all-polymer heterojunction film, a photocurrent anisotropy was found with a polarized photocurrent ratio of 2.6. The detectivity of these IPPDs was found to be 1.9 × 1011 Jones (@ ∼600 nm, 0 V bias). Our work shows that oriented polymer donor-acceptor films fabricated using bottom-up self-assembly have great potential in applications, such as polarization detection.
Author
Xuhao Luo
Jinan University
Yingying Xue
Jinan University
Juntao Wu
Jinan University
Wanzhu Cai
Jinan University
Daniela Täuber
Leibniz-Institut Für Photonische Technologien E.V.
Friedrich Schiller University Jena
Ivan Malovicho
attocube systems AG
Bogdan Sava
attocube systems AG
Guobiao Cen
Jinan University
Xing Lu
Jinan University
Chuanxi Zhao
Jinan University
Ivan Scheblykin
Lund University
Jianhui Yu
Jinan University
Wenjie Mai
Jinan University
Feng Liu
Shanghai Jiao Tong University
Ergang Wang
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Lintao Hou
Jinan University
Applied Physics Letters
0003-6951 (ISSN) 1077-3118 (eISSN)
Vol. 121 23 233301Subject Categories
Atom and Molecular Physics and Optics
Other Physics Topics
Condensed Matter Physics
DOI
10.1063/5.0128850