物理化学学报2026，Vol.42Issue(11)：25-36,12.DOI:10.1016/j.actphy.2026.100253
通过调整电荷注入方向实现的绿色/红色双模式倍增型有机光电探测器
Green/red dual-mode photomultiplication model organic photodetectors via adjusting charge injection direction
摘要
Abstract
Dual-mode photomultiplication model organic photodetectors(PMOPDs)were fabricated with an architecture of poly(9,9-dioctylfluorene-alt-benzothiadiazole)(F8BT):poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b']dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-)-2-carboxylate-2-6-diyl](PTB7-Th)(3:1,w/w)/Glass/indium tin oxide(ITO)/poly[(9,9-bis(3'-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-5,5'-bis(2,2'-thiophene)-2,6-naphthalene-1,4,5,8-tetracaboxylic-N,N'-di(2-ethylhexyl)imide](PNDIT-F3N)/poly(3-hexylthiophene)(P3HT):[6,6]-phenylC71-butyric acid methyl ester(PC71BM)(100:1,w/w)/Aluminum(Al).To modulate the optical field distribution,an external layer of F8BT:PTB7-Th acts as an organic filter layer(OFL)in PMOPDs.Dual-mode characteristics can be achieved from PMOPDs under forward and reverse bias,which is individually determined by the trapped electron distribution near ITO and Al electrode.The PMOPDs achieve a green narrowband response under 8 V bias,with peak external quantum efficiency(EQE)of 8880%at 545 nm and full width at half maximum(FWHM)of 85 nm.Conversely,a red narrowband response is registered under-8 V bias of PMOPDs,centered at 620 nm with peak EQE of 750%and FWHM of 60 nm.The operating mechanism for the switchable mode of PMOPDs involves the modulation of trapped electron distribution,which shifts between the vicinity of ITO electrode under forward bias and Al electrode under reverse bias.A photoplethysmography(PPG)measurement system based on the optimal dual-mode PMOPDs was developed to enable the successful monitoring of heart rate across different conditions.The velocity plethysmography and acceleration plethysmography can be obtained from original PPG signals to estimate arteriosclerosis for vascular disease diagnosis.关键词
光电倍增/双模式/窄响应/心率监测Key words
Photomultiplication/Dual-mode/Narrowband response/Heart rate monitoring分类
化学化工引用本文复制引用
张帅,屈宏飞,张路,赵兴超,张路鑫,马尧,沈亮,马晓玲,张福俊..通过调整电荷注入方向实现的绿色/红色双模式倍增型有机光电探测器[J].物理化学学报,2026,42(11):25-36,12.基金项目
本工作由中央高校基本科研业务费(2025YJS187) （2025YJS187）
国家自然科学基金(U22A6002,62475094,12474420,12404471)资助 （U22A6002,62475094,12474420,12404471）
