Affiliation:
1. State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 35002 China
2. School of Physical Science and Technology ShanghaiTech University Shanghai 201210 P. R. China
3. Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering Jiangxi Normal University Nan Chang Jiangxi 330022 China
4. Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou Fujian 350108 China
Abstract
AbstractOrganic–inorganic hybrid MAPbCl3 perovskite (MA+ = CH3NH3+) in UV photodetection is drawing interest due to its superior semiconductor properties and UV‐matchable optical bandgap. However, MAPbCl3‐based photodetector targeting high‐performance polarized light detection has remained unexplored due to the isotropic structure of MAPbCl3. The photovoltaic effect in the heterojunction, which shows an angle dependence on light polarization, provides opportunities to break the restriction of intrinsic structure for realizing polarization‐sensitive photodetection. Herein, an effective strategy is reported to realize high‐performance polarization‐sensitive UV photodetection by constructing a heterojunction with two isotropic materials MAPbCl3 and Silicon (Si). Emphatically, the photovoltage in MAPbCl3/Si heterojunction changes with the angle of polarized light with the maximum (minimum) value of 0.15 V (0.05 V), originating from the built‐in electric field. More interestingly, driven by the photovoltage, the device thus exhibits a large polarization ratio (Imax/Imin) of 2.9 at 377 nm under the self‐driven mode. Besides, the present device also delivers high‐performance photodetection in UV region owing to the superior photoresponse of MAPbCl3, including a high detectivity (D*) of 2.93 × 1011 Jones, a superior responsibility of 8 mA W–1, a substantial switching ratio of 900, and an ultrafast response speed of 40/98 µs at 0 V bias. This work opens a new avenue for high‐performance polarization‐sensitive photodetection by utilizing angle‐dependent photovoltage effect.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Fujian Province
National Postdoctoral Program for Innovative Talents
National Key Research and Development Program of China
Subject
Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Cited by
4 articles.
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