中国光学（中英文）2026，Vol.19Issue(1)：19-28,10.DOI:10.37188/CO.2025-0114
非富勒烯掺杂对平面异质结有机光电探测器的光电特性影响
Effect of non-fullerene doping on the photoelectric properties of planar heterojunction organic photodetectors
摘要
Abstract
This study investigates the impact of doping the non-fullerene small molecule IEICO-4F into the acceptor component of a planar heterojunction organic photodetector based on the P3HT:PC71BM system on the device's optoelectronic properties.The active layer films with different doping ratios were fabricated us-ing a solution process.Characterization techniques including current-voltage measurements,external quantum efficiency,ultraviolet-visible-near-infrared absorption spectroscopy,and photoluminescence spec-troscopy were employed,combined with atomic force microscopy to analyze morphological evolution.Ex-perimental results demonstrate that the introduction of IEICO-4F significantly broadens the absorption spec-trum of the active layer into the near-infrared region(700-900 nm)and enhances photon capture efficiency through complementary absorption spectrum.At an optimized doping ratio of 30％,the device's photocurrent density increases from 19.17 mA/cm2 to 27.25 mA/cm2,and the specific detectivity improves from 0.78× 1012 Jones to 1.45×1012 Jones.Morphological analysis confirms that IEICO-4F optimizes the phase distribu-tion of PC71BM,forming a finer interpenetrating network structure that facilitates charge transfer and re-duces series resistance.The study also reveals that excessive doping disrupts the phase separation balance,adversely affecting carrier separation and transport,leading to an imbalance in electron-hole transport.This work highlights the multifaceted regulatory effect of non-fullerene acceptor doping on traditional polymer:fullerene systems,effectively enhancing device performance through the synergistic mechanisms of spectral broadening and morphological optimization,thereby providing new insights for the design of organic photo-detector material systems.关键词
平面异质结/有机光电探测器/吸收光谱/电荷转移Key words
planar heterojunction/organic photodetectors/absorption spectrum/charge carrier transport分类
信息技术与安全科学引用本文复制引用
单正叶,刘頔,张侃,倪程鹏,孙金芳,程斌..非富勒烯掺杂对平面异质结有机光电探测器的光电特性影响[J].中国光学（中英文）,2026,19(1):19-28,10.基金项目
安徽省高等学校科学研究项目(自然科学)(No.2024AH050645,No.2025AHGXZK30157) （自然科学）
安徽省高等学校省级质量工程项目(No.2024dzxkc147)资助的课题Supported by the Natural Science Foundation of the Higher Education Institutions of Anhui Province,China(No.2024AH050645,No.2025AHGXZK30157) （No.2024dzxkc147）
the Quality Project for Higher Education Institutions of An-hui Province,China(No.2024dzxkc147) （No.2024dzxkc147）
