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dc.contributor.authorLin, Yen-Hung
dc.contributor.authorHuang, Wentao
dc.contributor.authorPattanasattayavong, Pichaya
dc.contributor.authorLim, Jongchul
dc.contributor.authorLi, Ruipeng
dc.contributor.authorSakai, Nobuya
dc.contributor.authorPanidi, Julianna
dc.contributor.authorHong, Min Ji
dc.contributor.authorMa, Chun
dc.contributor.authorWei, Nini
dc.contributor.authorWehbe, Nimer
dc.contributor.authorFei, Zhuping
dc.contributor.authorHeeney, Martin
dc.contributor.authorLabram, John G.
dc.contributor.authorAnthopoulos, Thomas D.
dc.contributor.authorSnaith, Henry J.
dc.identifier.citationLin, Y.-H., Huang, W., Pattanasattayavong, P., Lim, J., Li, R., Sakai, N., … Snaith, H. J. (2019). Deciphering photocarrier dynamics for tuneable high-performance perovskite-organic semiconductor heterojunction phototransistors. Nature Communications, 10(1). doi:10.1038/s41467-019-12481-2
dc.description.abstractLooking 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.
dc.description.sponsorshipThis project was funded by EPSRC, Engineering and Physical Sciences Research Council grants, EP/M005143/1 and EP/P006329/1. T.D.A. acknowledges the King Abdullah University of Science and Technology (KAUST) for the financial support. This work used CMS beamline of the National Synchrotron Light Source II, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Brookhaven National Laboratory under Contract No. DE-SC0012704.
dc.publisherSpringer Science and Business Media LLC
dc.rightsArchived with thanks to Nature Communications
dc.titleDeciphering photocarrier dynamics for tuneable high-performance perovskite-organic semiconductor heterojunction phototransistors
dc.contributor.departmentElectron Microscopy
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentSurface Science
dc.identifier.journalNature Communications
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionClarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK.
dc.contributor.institutionDepartment of Physics and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ, UK.
dc.contributor.institutionDepartment of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong, 21210, Thailand.
dc.contributor.institutionNational Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York, 11973, USA.
dc.contributor.institutionSchool of Electrical Engineering and Computer Science, Oregon State University, Corvallis, OR, 97331, USA.
dc.contributor.institutionDepartment of Chemistry and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ, UK.
kaust.personMa, Chun
kaust.personWei, Nini
kaust.personWehbe, Nimer
kaust.personAnthopoulos, Thomas D.

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