A contact study in hole conductor free perovskite solar cells with low temperature processed carbon electrodes. Issue 34 (11th April 2017)

• Record Type: Journal Article
• Authors: Li, J.; Yao, J. X.; Liao, X. Y.; Yu, R. L.; Xia, H. R.; Sun, W. T.; Peng, L. M.
• Is Part Of: RSC advances. Volume 7:Issue 34(2017)
• Page Start: 20732
• Page End: 20737
• Publication Date: 2017-04-11
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra00066a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : (a) A schematic structure of the perovskite solar cell device and (b) the corresponding energy band diagram and the carrier transport process. Abstract : Hole conductor material (HTM) free photovoltaic devices with graphite electrodes were fabricated at low temperature. An FTO/perovskite contact and TiO2 /graphite contact were investigated. The results suggest that the carrier recombination processes resulting from FTO/perovskite and TiO2 /carbon contacts affect the device performance greatly. By optimization, a 65 nm TiO2 compact layer with a 380 nm TiO2 mesoporous layer can efficiently decrease the contact between FTO and perovskite materials. The contact between TiO2 and graphite was lowered by the improvement of perovskite coverage. The photo-voltages were enhanced from 0.695 V to 0.820 V and a best efficiency of 10.4% was obtained.