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Hysteresis effects on carrier transport and photoresponse characteristics in hybrid perovskites
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering. Xidian Univ, Peoples R China.
Xidian Univ, Peoples R China; Ningbo Univ, Peoples R China.
Northwestern Polytech Univ, Peoples R China.
Xian Univ Sci and Technol, Peoples R China.
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2020 (English)In: Journal of Materials Chemistry C, ISSN 2050-7526, E-ISSN 2050-7534, Vol. 8, no 6, p. 1962-1971Article in journal (Refereed) Published
Abstract [en]

Organic-inorganic hybrid perovskites have recently emerged as promising potential candidate materials in the area of photoelectrics due to their unparalleled optoelectronic features. However, the performance of an optoelectronic device is always affected by the mixed ionic and electronic conducting behavior within perovskites. Herein, the hysteresis effect on carrier mobility and photoresponse characteristics of perovskites were investigated through adding rational additives to the precursor solution. The results show that the perovskite with foreign fullerene derivative (PCBM) additive can suppress hysteresis behavior and increase the mobility by two-fold, while the perovskite with native iodine (I) additive will amplify hysteresis and reduce the mobility by two orders of magnitude at the room temperature compared with that of the pure perovskite. Furthermore, we found that the response characteristics of the photodetectors are strongly affected by the carrier mobility. Capacitance-voltage results confirm the significant change in hysteresis after the introduction of different additives, which explains the changes in mobility and photoresponse time. Our results enlighten the hysteresis effect related to carrier transport and photoresponse characteristics, and provide guidance for the development of reliable, high performance perovskite devices.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY , 2020. Vol. 8, no 6, p. 1962-1971
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-164381DOI: 10.1039/c9tc06326aISI: 000515394000004OAI: oai:DiVA.org:liu-164381DiVA, id: diva2:1415858
Note

Funding Agencies|National Natural Science Foundation of ChinaNational Natural Science Foundation of China [51472196, 11304170, 61704125, 61874084, 61974119, 51711530035]; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities [XJS17059, JBX171105]; Innovation Fund of Xidian Universities; Swedish Foundation for International Cooperation in Research and Higher Education (STINT) [CH2016-6722]; China Scholarship CouncilChina Scholarship Council

Available from: 2020-03-20 Created: 2020-03-20 Last updated: 2020-03-20

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