Spiro-bifluorene core based hole transporting material with graphene oxide modified CH3NH3PbI3 for inverted planar heterojunction solar cells. (1st October 2019)

• Record Type: Journal Article
• Authors: Ameen, Sadia; Akhtar, M. Shaheer; Nazim, M.; Kim, Eun-Bi; Nazeeruddin, Mohammad Khaja; Shin, Hyung-Shik
• Is Part Of: Electrochimica acta. Volume 319(2019)
• Page Start: 885
• Page End: 894
• Publication Date: 2019-10-01
• Subjects: Hole transporting materials -- Spiro bifluorene based small molecule -- Graphene oxide-perovskite hybrid -- Perovskite solar cell; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2019.07.031
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Inverted planar heterojunction solar cells (iPHSCs) were fabricated with novel spiro-bifluorene (CF-Sp-BTh) based hole transport material (HTM) and graphene oxide (GO) modified perovskite (CH3 NH3 PbI3 ) as sensitizer. CF-Sp-BTh exhibited relatively high hole mobility and favorable HOMO level with respect to the valence band of CH3 NH3 PbI3 . iPHSC using CF-Sp-BTh HTM and GO (0.5 wt%)-CH3 NH3 PbI3 achieved the power conversion efficiency (PCE) of ∼14.28%, with open circuit voltage (VOC ) of ∼1.07 V and a short circuit current density (JSC ) of ∼18.82 mA/cm 2 . The photovoltaic performance of FTO/CF-Sp-BTh/GO (0.5 wt%)-CH3 NH3 PbI3 /PC61 BM/Au was higher compared to pristine CH3 NH3 PbI3 and other GO-CH3 NH3 PbI3 hybrid based devices. The photoluminescence decay and electrochemical impedance spectra confirmed an enhanced charge separation and retarded charge recombination of GO-CH3 NH3 PbI3 hybrid based iPHSCs.