Antimony selenosulfide (Sb(S,Se)) solar cells have achieved an efficiency of over 10.0%. However, the uncontrollable hydrothermal process makes preparing high-quality Sb(S,Se) thin films a bottleneck for efficient Sb(S,Se) solar cell.
View Article and Find Full Text PDFAntimony sulfide (SbS) photodetectors (PDs) possess extensive application prospects. Efficient carrier transport of a PD significantly affects the detectivity and response speed. Herein, we propose an all-inorganic self-powered SbS PD based on vertical TiO nanorods (NRs).
View Article and Find Full Text PDFJ Colloid Interface Sci
January 2025
Photocatalysis, which uses sunlight, N and HO to produce NH, is a more sustainable approach to N fixation than the Haber-Bosch process. However, its efficiency is severely limited by the difficulty of activating NN bonds. This work presents metal (M = Cu, Fe, V)-substituted MIL-125(Ti) (MIL-(MTi)) for photocatalytic N fixation without using any sacrificial agents.
View Article and Find Full Text PDFIon doping is an effective strategy for achieving high-performance flexible Cu ZnSn(S,Se) (CZTSSe) solar cells by defect regulations. Here, a Li&Na co-doped strategy is applied to synergistically regulate defects in CZTSSe bulks. The quality absorbers with the uniformly distributed Li and Na elements are obtained using the solution method, where the acetates (LiAc and NaAc) are as additives.
View Article and Find Full Text PDFFlexible CZTSSe solar cells have attracted much attention due to their earth-abundant elements, high stability, and wide application prospects. However, the environmental problems caused by the high toxicity of the Cd in the buffer layers restrict the development of flexible CZTSSe solar cells. Herein, we develop a Cd-free flexible CZTSSe/ZnO solar cell.
View Article and Find Full Text PDFFast and non-destructive analysis of material defect is a crucial demand for semiconductor devices. Herein, we are devoted to exploring a solar-cell defect analysis method based on machine learning of the modulated transient photovoltage (m-TPV) measurement. The perturbation photovoltage generation and decay mechanism of the solar cell is firstly clarified for this study.
View Article and Find Full Text PDFFlexible Cu ZnSn(S,Se) (CZTSSe) solar cells show great potential due to non-toxicity and low cost. The quality of CZTSSe absorber suffering from the high-temperature selenization process is the key to overcoming open-circuit voltage (V ) deficit and obtaining high efficiency. In this work, the authors develop a selenization technique to improve the quality of the CZTSSe layer by pre-evaporation selenization.
View Article and Find Full Text PDFACS Appl Mater Interfaces
March 2021
In perovskite solar cells, the halide vacancy defects on the perovskite film surface/interface will instigate charge recombination, leading to a decrease in cell performance. In this study, cadmium sulfide (CdS) has been introduced into the precursor solution to reduce the halide vacancy defects and improve the cell performance. The highest efficiency of the device reaches 21.
View Article and Find Full Text PDFACS Appl Mater Interfaces
June 2020
The stability issue hinders the commercialization of the perovskite solar cells (PSCs), which is widely recognized. The efficiency generally decreases over time during the working condition. Here, we report an efficiency enhancement phenomenon of PSCs in the stability test at the maximum power point, which is speculated to be related to the electric-field-induced ion migration.
View Article and Find Full Text PDFAqueous precursors provide an alluring approach for low-cost and environmentally friendly production of earth-abundant CuZnSn(S, Se) (CZTSSe) solar cells. The key is to find an appropriate molecular agent to prepare a stable solution and optimize the coordination structure to facilitate the subsequent crystallization process. Herein, we introduce thioglycolic acid (TGA), which possesses strong coordination (SH) and hydrophilic (COOH) groups, as the agent and use deprotonation to regulate the coordination competition within the aqueous solution.
View Article and Find Full Text PDFSurface passivation is an effective approach to eliminate defects and thus to achieve efficient perovskite solar cells, while the stability of the passivation effect is a new concern for device stability engineering. Herein, tribenzylphosphine oxide (TBPO) is introduced to stably passivate the perovskite surface. A high efficiency exceeding 22%, with steady-state efficiency of 21.
View Article and Find Full Text PDFIn this study, we systematically explored the mixed-cation perovskite Cs (MAFA)PbI fabricated via sequential introduction of cations. The details of the effects of Cs on the fabrication and performance of inorganic-organic mixed-cation perovskite solar cells examined in detail in this study are beyond the normal understanding of the adjusting band gap. It is found that a combined intercalation of Cs and dimethyl sulfoxide (DMSO) in PbI-DMSO precursor film formed a strong and steady coordinated intermediate phase to retard PbI crystallization, suppress yellow nonperovskite δ-phase, and obtain a highly reproducible perovskite film with less defects and larger grains.
View Article and Find Full Text PDFPAF-86 film is electropolymerized (EP) by targeted monomer M1 tethered bifunctional carbozolyl moieties which not only serve in electron donation but also provide effective electrochemical (EC) active sites. The resulting PAF-86 film possesses a fairly compact surface, remarkable stability, efficient hole extraction capacity, and hole-transporting materials (HTMs) for inverted heterojunction perovskite solar cells (PSCs). Likewise, our investigation shows that PAF-86 film based perovskite solar cells (PSCs) retained about 80% power conversion efficiency (PCE) without encapsulation in air, and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) based PSCs devices reduce to 4% under the same conditions.
View Article and Find Full Text PDFACS Appl Mater Interfaces
August 2017
DMF as an additive has been employed in FAI/MAI/IPA (FA= CH(NH), MA = CHNH, IPA = isopropanol) solution for a two-step multicycle spin-coating method in order to prepare high-quality FAMAPbIBr perovskite films. Further investigation reveals that the existence of DMF in the FAI/MAI/IPA solution can facilitate perovskite conversion, improve the film morphology, and reduce crystal defects, thus enhancing charge-transfer efficiency. By optimization of the DMF amount and spin-coating cycles, compact, pinhole-free perovskite films are obtained.
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