Influence of organic cations on high-performance CH3NH3PbI3 based photovoltaics

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/101759

Title:	Influence of organic cations on high-performance CH3NH3PbI3 based photovoltaics
Authors:	吳春桂;Chang, Sheng Hsiung;Lin, Kuen-Feng;Cheng, Hsin-Ming;Chen, Cheng-Chiang;Wu, Wen-Ti;Chen, Wei-Nien;Wu, Pin-Jiun;Chen, Sheng-Hui;Wu, Chun-Guey
Contributors:	理學院化學學系
Keywords:	Organic cation;Perovskite absorber;Photovoltaics;Raman scattering
Date:	2016-02-01
Issue Date:	2026-04-21 14:43:22 (UTC+8)
Publisher:	Elsevier BV;Elsevier B.V
Abstract:	摘要： A comprehensive study was carried out to understand the influence of organic cations on high-performance CH3NH3PbI3 based photovoltaics. Scanning electron microscope, X-ray diffractometer, Hall measurement, absorbance spectrum, photoluminescence (PL) spectrum and nanosecond time-resolved PL measurements were used to explore the structural, electrical, optical and excitonic characteristics of CH3NH3PbI3 thin films fabricated under different thermal annealing temperatures from 60°C to 140°C. The decrease in the open-circuit voltage (VOC) with an increase in the thermal annealing temperature can be explained as due to the reduced work function of the CH3NH3PbI3 thin film. The short-circuit current density (JSC) of the CH3NH3PbI3 based photovoltaics is dependent on the efficiencies of light absorption and carrier collection, which results in an optimized JSC when the thermal annealing temperature is 120°C. The atomistic interaction between the organic cations and Pb–I framework strongly influences the absorbance of CH3NH3PbI3 thin films, as confirmed by the libration of CH3NH3 cations shown by Raman scattering spectroscopy. In addition, the experimental results indicate that the power conversion efficiency can be further improved when the absorption strength of the CH3NH3PbI3 thin film and the energy-level alignment of each photovoltaic layer are simultaneously fulfilled. •The libration of organic cations was observed by Raman scattering.•The interaction between the cations and Pb–I framework strongly influences the JSC.•The Voc is dependent on the Fermi level of the perovskite thin film.•The PCE of perovskite photovoltaics is limited by the trade-off between JSC and VOC. 出版者： Elsevier B.V 出版日期： 2016-02-01 出處： Solar energy materials and solar cells, 2016-02, Vol.145, p.375-381 資源來源： ScienceDirect (Elsevier) Journals 版權： 2015 Elsevier B.V. 識別號： ISSN: 0927-0248 識別號： EISSN: 1879-3398 識別號： DOI: 10.1016/j.solmat.2015.10.045
Appears in Collections:	[Department of Chemistry] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	31	View/Open

社群 sharing

Loading...