Deciphering photocarrier dynamics for tuneable high-performance perovskite-organic semiconductor heterojunction phototransistors.

Autor: Lin YH; Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK. yen-hung.lin@physics.ox.ac.uk., Huang W; Department of Physics and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ, UK., Pattanasattayavong P; Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong, 21210, Thailand., Lim J; Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK., Li R; National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York, 11973, USA., Sakai N; Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK., Panidi J; Department of Physics and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ, UK., Hong MJ; School of Electrical Engineering and Computer Science, Oregon State University, Corvallis, OR, 97331, USA., Ma C; Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia., Wei N; King Abdullah University of Science and Technology (KAUST), Core Labs, Thuwal, 23955-6900, Saudi Arabia., Wehbe N; King Abdullah University of Science and Technology (KAUST), Core Labs, Thuwal, 23955-6900, Saudi Arabia., Fei Z; Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ, UK.; Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Tianjin University, Tianjin, 300072, China., Heeney M; Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ, UK., Labram JG; School of Electrical Engineering and Computer Science, Oregon State University, Corvallis, OR, 97331, USA., Anthopoulos TD; Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia. thomas.anthopoulos@kaust.edu.sa., Snaith HJ; Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK. henry.snaith@physics.ox.ac.uk.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2019 Oct 02; Vol. 10 (1), pp. 4475. Date of Electronic Publication: 2019 Oct 02.
DOI: 10.1038/s41467-019-12481-2
Abstrakt: Looking beyond energy harvesting, metal-halide perovskites offer great opportunities to revolutionise large-area photodetection technologies due to their high absorption coefficients, long diffusion lengths, low trap densities and simple processability. However, successful extraction of photocarriers from perovskites and their conversion to electrical signals remain challenging due to the interdependency of photogain and dark current density. Here we report hybrid hetero-phototransistors by integrating perovskites with organic semiconductor transistor channels to form either "straddling-gap" type-I or "staggered-gap" type-II heterojunctions. Our results show that gradual transforming from type-II to type-I heterojunctions leads to increasing and tuneable photoresponsivity with high photogain. Importantly, with a preferential edge-on molecular orientation, the type-I heterostructure results in efficient photocarrier cycling through the channel. Additionally, we propose the use of a photo-inverter circuitry to assess the phototransistors' functionality and amplification. Our study provides important insights into photocarrier dynamics and can help realise advanced device designs with "on-demand" optoelectronic properties.
Databáze: MEDLINE