期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 2, 期 23, 页码 8607-8611出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta00379a
关键词
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资金
- Ministry of Science and Technology of China (863) [SS2013AA50303]
- National Natural Science Foundation of China [61106056]
- Science and Technology Department of Hubei Province [2013BAA090]
- Fundamental Research Funds for the Central Universities [HUSTNY022]
- Scientific Research Foundation for Returned Scholars, Ministry of Education of China
Highly ordered mesoporous carbon (OMC) with well-connected frameworks was applied in mesoscopic CH3NH3PbI3/TiO2 heterojunction solar cells as counter electrode. The OMC were synthesized by a template method and mixed with flaky graphite to prepare the carbon paste, which was used to fabricate the counter electrode by screen-printing technology. The OMC based solar cell presented a fill factor (FF) of 0.63 and a power conversion efficiency (eta) of 7.02%, which was a remarkable improvement compared with the carbon black based device. The electrochemical impedance spectrum measurement demonstrated that the uniform mesopores and interconnected structures in the carbon counter electrode promoted the decrease of charge transfer resistance at the interface and thereby the higher FF and eta was obtained.
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