An annealing-free aqueous-processed anatase TiO2 compact layer for efficient planar heterojunction perovskite solar cells. Issue 79 (21st June 2017)

• Record Type: Journal Article
• Authors: Yang, Chengwu; Yu, Mingyu; Chen, Dichun; Zhou, Yaqing; Wang, Wei; Li, Yang; Lee, Tung-Chun; Yun, Daqin
• Is Part Of: Chemical communications. Volume 53:Issue 79(2017)
• Page Start: 10882
• Page End: 10885
• Publication Date: 2017-06-21
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c7cc01104k
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : We report efficient perovskite solar cells (PCE = 18.29 ± 0.18%) based on TiO2 films synthesised via a facile aqueous, annealing-free route. Abstract : A facile aqueous-based fabrication scheme is developed for producing annealing-free anatase TiO2 (AF-TiO2 ) films that exhibit efficient electron transport properties in planar heterojunction perovskite solar cells (PSCs). AF-TiO2 films are fabricated by spin coating on a substrate a colloidal solution of anatase TiO2 nanoparticles (NPs) prepared via a low temperature hydrolytic sol–gel method. The resultant AF-TiO2 films show low electrical resistance, high transmittance in the visible and near-infrared regions and facilitation of high-quality perovskite film formation, which can be attributed to their homogeneous surface morphology and nanocrystallinity. The AF-TiO2 based PSCs achieve a power conversion efficiency (PCE) of 18.29 ± 0.18%, showing significant improvement compared to the control PSCs (PCE = 11.33 ± 0.32%) based on TiO2 films made by high-temperature annealing of amorphous TiO2 (HTA-TiO2 ).