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Electrically Tunable Multiple‐Effects Synergistic and Boosted Photoelectric Performance in Te/WSe2 Mixed‐Dimensional Heterojunction Phototransistors
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Electrically Tunable Multiple‐Effects Synergistic and Boosted Photoelectric Performance in Te/WSe2 Mixed‐Dimensional Heterojunction Phototransistors
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Electrically Tunable Multiple‐Effects Synergistic and Boosted Photoelectric Performance in Te/WSe2 Mixed‐Dimensional Heterojunction Phototransistors
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Journal Article
Electrically Tunable Multiple‐Effects Synergistic and Boosted Photoelectric Performance in Te/WSe2 Mixed‐Dimensional Heterojunction Phototransistors
2024
Overview
Mix‐dimensional heterojunctions (MDHJs) photodetectors (PDs) built from bulk and 2D materials are the research focus to develop hetero‐integrated and multifunctional optoelectronic sensor systems. However, it is still an open issue for achieving multiple effects synergistic characteristics to boost sensitivity and enrich the prospect in artificial bionic systems. Herein, electrically tunable Te/WSe2 MDHJs phototransistors are constructed, and an ultralow dark current below 0.1 pA and a large on/off rectification ratio of 106 is achieved. Photoconductive, photovoltaic, and photo‐thermoelectric conversions are simultaneously demonstrated by tuning the gate and bias. By these synergistic effects, responsivity and detectivity respectively reach 13.9 A W−1 and 1.37 × 1012 Jones with 400 times increment. The Te/WSe2 MDHJs PDs can function as artificial bionic visual systems due to the comparable response time to those of the human visual system and the presence of transient positive and negative response signals. This work offers an available strategy for intelligent optoelectronic devices with hetero‐integration and multifunctions. In this work, electrically tunable multiple‐mechanisms synergistic Te/WSe2 MDHJs phototransistors are constructed. By modulating the gate and bias, the R and D* are significantly improved by the synergism of PC, PV, and photo‐thermoelectric (PTE) conversion. Transient PTE photocurrent signals can well simulate the human visual system, implying that the device can undertake the function of artificial bionic visual systems.
Publisher
John Wiley & Sons, Inc,John Wiley and Sons Inc,Wiley
