Dataset Information

UV-O₃ treated annealing-free cerium oxide as electron transport layers in flexible planar perovskite solar cells.

ABSTRACT: Fabricating electron transport layers at low temperatures is challenging but highly desired in the field of flexible perovskite solar cells (f-PSCs). In this study, highly uniform cerium oxide (CeO _x ) films prepared by the UV-O₃ treatment have been successfully applied as the electron transport layer (ETL) in methylammonium lead halide (CH₃NH₃PbI₃) perovskite-based f-PSCs. Under AM 1.5 G sunlight with 100 mW cm^-2, these cells exhibited an open-circuit voltage (V _oc) of 0.98 V, a short-circuit current density (J _sc) of 19.42 mA cm^-2, a fill factor (FF) of 0.72 and power conversion efficiency (PCE) of 14.63%. The PCE was much higher than that of the control planar CeO _x ETL (PCE ∼ 9.08%) prepared at a low temperature (80 °C) without the UV-O₃ treatment, and this was ascribed to the improved CeO _x film, enhanced light absorption and suppressed charge recombination. The cells that bend at 15 mm of radius showed excellent stability with less than 10% reduction in PCE after 500 cycles of repeated bending at ambient temperature. The charge-transmission kinetic parameters and long-term stability of the CeO _x -based f-PSCs were analyzed as well.

SUBMITTER: Pang A

PROVIDER: S-EPMC9419069 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

UV-O3 treated annealing-free cerium oxide as electron transport layers in flexible planar perovskite solar cells.

Pang Aiying A Li Jinlong J Wei Xiao-Feng XF Ruan Zhi-Wu ZW Yang Ming M Chen Zhong-Ning ZN

Nanoscale advances 20200723 9

Fabricating electron transport layers at low temperatures is challenging but highly desired in the field of flexible perovskite solar cells (f-PSCs). In this study, highly uniform cerium oxide (CeO x ) films prepared by the UV-O3 treatment have been successfully applied as the electron transport layer (ETL) in methylammonium lead halide (CH3NH3PbI3) perovskite-based f-PSCs. Under AM 1.5 G sunlight with 100 mW cm-2, these ce ...[more]

PMID: 36132788

Similar Datasets

Project description:Electron transport layers (ETLs) play a fundamental role in perovskite solar cells (PSCs) through charge extraction. Here, we developed flexible PSCs on 12 different kinds of ETLs based on SnO2. We show that ETLs need to be specifically developed for plastic substrates in order to attain 15% efficient flexible cells. Recipes developed for glass substrates do not typically transfer directly. Among all the ETLs, ZnO/SnO2 double layers delivered the highest average power conversion efficiency of 14.6% (best cell 14.8%), 39% higher than that of flexible cells of the same batch based on SnO2-only ETLs. However, the cells with a single ETL made of SnO2 nanoparticles were found to be more stable as well as more efficient and reproducible than SnO2 formed from a liquid precursor (SnO2-LP). We aimed at increasing the understanding of what makes a good ETL on polyethylene terephthalate (PET) substrates. More so than ensuring electron transport (as seen from on-current and series resistance analysis), delivering high shunt resistances (R SH) and lower recombination currents (I off) is key to obtain high efficiency. In fact, R SH of PSCs fabricated on glass was twice as large, and I off was 76% lower in relative terms, on average, than those on PET, indicating considerably better blocking behavior of ETLs on glass, which to a large extent explains the differences in average PCE (+29% in relative terms for glass vs PET) between these two types of devices. Importantly, we also found a clear trend for all ETLs and for different substrates between the wetting behavior of each surface and the final performance of the device, with efficiencies increasing with lower contact angles (ranging between ∼50 and 80°). Better wetting, with average contact angles being lower by 25% on glass versus PET, was conducive to delivering higher-quality layers and interfaces. This cognizance can help further optimize flexible devices and close the efficiency gap that still exists with their glass counterparts.

Dataset Information

UV-O₃ treated annealing-free cerium oxide as electron transport layers in flexible planar perovskite solar cells.

Publications

UV-O<sub>3</sub> treated annealing-free cerium oxide as electron transport layers in flexible planar perovskite solar cells.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets