| Literature DB >> 26445167 |
Gill Sang Han1,2, Young Hyun Song1, Young Un Jin1, Jin-Wook Lee3, Nam-Gyu Park3, Bong Kyun Kang1, Jung-Kun Lee2, In Sun Cho4, Dae Ho Yoon1,5, Hyun Suk Jung1.
Abstract
We report on reduced graphene oxide (rGO)/mesoporous (mp)-TiO2 nanocomposite based mesostructured perovskite solar cells that show an improved electron transport property owing to the reduced interfacial resistance. The amount of rGO added to the TiO2 nanoparticles electron transport layer was optimized, and their impacts on film resistivity, electron diffusion, recombination time, and photovoltaic performance were investigated. The rGO/mp-TiO2 nanocomposite film reduces interfacial resistance when compared to the mp-TiO2 film, and hence, it improves charge collection efficiency. This effect significantly increases the short circuit current density and open circuit voltage. The rGO/mp-TiO2 nanocomposite film with an optimal rGO content of 0.4 vol % shows 18% higher photon conversion efficiency compared with the TiO2 nanoparticles based perovskite solar cells.Entities:
Keywords: TiO2 nanocomposite; charge collection; electron transport layer; perovskite solar cells; reduced graphene oxide
Year: 2015 PMID： 26445167 DOI： 10.1021/acsami.5b06171
Source DB: PubMed Journal: ACS Appl Mater Interfaces ISSN： 1944-8244 Impact factor: 9.229