Solution-processed lithium-doped ZnO electron transport layer for efficient triple cation (Rb, MA, FA) perovskite solar cells
MetadataShow full item record
The current work reports the lithium (Li) doping of a low-temperature processed zinc oxide (ZnO) electron transport layer (ETL) for highly efficient, triple-cation-based MA0.57FA0.38Rb0.05PbI3 (MA: methylammonium, FA: formamidinium, Rb: rubidium) perovskite solar cells (PSCs). Lithium intercalation in the host ZnO lattice structure is dominated by interstitial doping phenomena, which passivates the intrinsic defects in ZnO film. In addition, interstitial Li doping also downshifts the Fermi energy position of Li-doped ETL by 30 meV, which contributes to the reduction of the electron injection barrier from the photoactive perovskite layer. Compared to the pristine ZnO, the power conversion efficiency (PCE) of the PSCs incorporating lithium-doped ZnO (Li-doped) is raised from 14.07 to 16.14%. The superior performance is attributed to the reduced current leakage, enhanced charge extraction characteristics, and mitigated trap-assisted recombination phenomena in Li-doped devices, thoroughly investigated by means of electrochemical impedance spectroscopy (EIS) analysis. Li-doped PSCs also exhibit lower photocurrent hysteresis than ZnO devices, which is investigated with regard to the electrode polarization phenomena of the fabricated devices.
Showing items related by title, author, creator and subject.
A comprehensive review of Li4Ti5O12-based electrodes for lithium-ion batteries: The latest advancements and future perspectivesZhao, B.; Ran, R.; Liu, M.; Shao, Zongping (2015)© 2015 Elsevier B.V. All rights reserved. Advanced electrical energy storage technology is a game changer for a clean, sustainable, and secure energy future because efficient utilization of newable energy hinges on ...
Martin, T.; O'Donnell, Kane; Shiozawa, H.; Giusca, C.; Fox, N.; Silva, S R.; Cherns, D. (2011)Thin lithium layers on oxygenated C(100) boron-doped diamond have been observed using x-ray photoemission spectroscopy. Conductive boron-doped diamond was oxygen- terminated using an ozone cleaner. Lithium was evaporated ...
Cai, R.; Yuan, T.; Ran, R.; Liu, X.; Shao, Zongping (2011)Spinel-type Al3+-doped Li4Ti5O12 oxide with the nominal composition of Li4Ti4.85Al0.15O12 was synthesized by a cellulose-assisted glycine–nitrate combustion process at reduced temperatures. X-ray diffraction characterization ...