Air‐Stable Solar Cells with 0.7 V Open‐Circuit Voltage Using Selenized Antimony Sulfide Absorbers Prepared by Hydrazine‐Free Solution Method

Abstract

Antimony chalcogenide is a promising absorber material for photovoltaic (PV) cells because of its tunable band gap, strong optical absorption, earthabundant, and nontoxic constituents. Here, a novel hydrazine-free approach for fabricating antimony chalcogenide films prepared via spray pyrolysis deposition with further selenylation, as well as high performance solar cells are reported. The fabricated antimony chalcogenide solar cells exhibits remarkably high open-circuit voltage (V OC ) comparing with that of Sb 2 Se 3 and Sb 2 S 3 devices. The distribution of Se during the selenylation process via refering to the Fick's second law is discussed. The results show that the selenized absorber has tremendously improved absorbance for visible light and a cascade-type energy level from surface to bulk, resulting in an ideal energy level matching for p-n junction. By introducing an efficient buffer layer, the detrimental short-circuit is avoided by reducing the cracks. Finally, 4.57% of the power conversion efficiency (PCE) of the solar cell is achieved. Furthermore, a module with a large-scale active area of 21 cm 2 is successfully fabricated, which shows a PCE of 3.19%, and a V OC of 3.42 V. The present work suggests that the antimony chalcogenide solar cells are promising for industrial application.

An effective combination reaction involved with sputtered and selenized Sb precursors for efficient Sb2Se3 thin film solar cells

“…Therefore, crystal orientation has become an essential issue in high-efficiency Sb 2 Se 3 thin film solar cell fabrication. Various thin film deposition techniques have been applied to fabricate highly optimized Sb 2 Se 3 absorber layer, such as solution method, [8][9][10][11] thermal evaporation, [7,[12][13][14][15] vapor transport deposition (VTD), [16][17][18] close spaced sublimation (CSS) [6,19,20] and sputtering. [21,22] To date, the highest PCE of Sb 2 Se 3 thin film solar cells in the substrate and superstrate configurations are 9.2% [19] and 7.6%, [16] respectively, where CSS and VTD methods were utilized to tune the crystal orientation and crystallinity of the Sb 2 Se 3 absorber layer precisely.…”

Semitransparent Sb2S3 thin film solar cells by ultrasonic spray pyrolysis for use in solar windows

“…A recent paper showed a PCE of 4.6% in solar cells based on Sb 2 (S,Se) 3 grown onto planar CdS by USP, followed by Se vapor annealing at ≈400 °C. However, pristine Sb 2 S 3 solar cells consistently yielded a PCE below 0.1% [45]. This clearly illustrates the difficulty of preparing high quality Sb 2 S 3 absorber layers by USP.…”

Preparation of Monodispersed Cs0.33WO3 Nanocrystals by Mist Chemical Vapor Deposition for Near-Infrared Shielding Application

“…All the substrates were cleaned with alkaline detergent (RM10-07, Rigorous Co., Ltd., Shenzhen, China) and were consecutively immersed in an ultrasonic bath with de-ionized water before drying with nitrogen flux. Cs 0.33 WO 3 /polymer nanocomposites coating was fabricated utilizing an ultrasonic spray deposition apparatus, which was previously used in our study to prepare large-scale transparent conductive films and photovoltaic devices [ 21 , 22 ]. The spray solution consisted of dilute Cs 0.33 WO 3 ink and PUA prepolymer.…”

“…Importantly, the ink could be well mixed with most of conventional organic solvents and ultraviolet (UV) adhesives. Using a self-designed spray apparatus [ 21 , 22 ] and a UV box, smooth polymer nanocomposite coating was fabricated on glass. The composite coating exhibits a significantly high heat-shielding performance in practical applications.…”