2026-10-14T05:12:50Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34018408 2026-09-28T20:12:09Z category_1 category_4 category_146 category_915 category_12 category_14 category_931 category_135 portal_63 item_type_6 month_year_09_2026

Time-Integrated Phototransistor Based on Photoactive Gate Engineering for Ultra-Weak Light Detection Yue Cheng (24177) Yaoqiang Zhou (13253311) Shaoguang Zhao (19830153) Zekai Dong (12785432) Zheng Wei (1552159) Jian Zhang (1682) Li Tao (154250) Biophysics Biochemistry Space Science Physical Sciences not elsewhere classified Cell Biology Molecular Biology Information Systems not elsewhere classified Computational Biology temporal integration due photoactive gate engineering weak optical signals temporal accumulation within results establish time integrated phototransistor based integrated phototransistor miniaturized weak integrated photogating accumulation process accumulation circuitry power photodetection power detection light imaging light detection high photosensitivity efficient platform dynamically tunable detection limits 980 nm 520 nm 29 fw 2 pw Miniaturized weak-light detection is constrained by the reliance on external amplification and signal-accumulation circuitry. Here, we report a time-integrated phototransistor (TIPT) based on γ-InSe photoactive gate architecture that enables intrinsic signal amplification and temporal accumulation within a single device. This architecture enables continuous integration and amplification of weak optical signals, achieving ultra-low-power detection with high photosensitivity, with detection limits down to 29 fW at 520 nm and 4.2 pW at 980 nm. The accumulation process is dynamically tunable and resettable via gate control. A single-device sequential scanning reconstruction further validates improved image contrast through temporal integration due to the robustness and repeatability of TIPT. These results establish time-integrated photogating as a strategy for ultra-low-power photodetection, offering a compact and energy-efficient platform for miniaturized weak-light imaging. 2026-09-28T00:00:00Z Text Journal contribution 10.1021/acs.nanolett.6c03153.s001 https://figshare.com/articles/journal_contribution/Time-Integrated_Phototransistor_Based_on_Photoactive_Gate_Engineering_for_Ultra-Weak_Light_Detection/34018408 CC BY-NC 4.0