In addition, if a highly absorbent material is used in absorber layer, there is a possibility of photon absorption close to the surface. For example, a primary challenge comes in reduction of the reflectance by using a highly transparent material at the front surface. Solar cells face a significant loss if a portion of approaching light spectra is not properly absorbed. įor choosing an appropriate material for absorber layer, the ability to absorb light as much as possible in order to stimulate electrons to higher energy states and the ability to pass those excited electrons from the solar cell to the outer circuit are importantly taken into consideration. When such materials bear convenient electrical and optical properties such as an appropriate optical band gap, high optical absorption coefficient, high quantum yield for excited carriers, long diffusion length and life time for minority carriers, a significant conversion efficiency can be desired. To achieve an economical goal, the earth abundant, non-toxic and inexpensive materials have been attracted as a priority to the researchers. Besides, the thin film technology offers the opportunity to bring alternative materials overcoming the limit of conventional Si technology. For large scale production, thin film solar cells have proved their potential to meet these expectations. The recent challenge in photovoltaics is the eco-friendly fabrication of highly efficient and cost-effective solar cells. © 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement 1. This result reveals MoS 2 as an effective BSF for low cost, highly efficient dual-heterojunction structure for future fabrication. The insertion of MoS 2 in the ZnS/SnS pristine structure offers a significant improvement of the power conversion efficiency (PCE) within the detailed-balance limit with a rise from 20.1 to 41.4% with V OC of 0.91 V, J SC of 53.4 mA/cm 2 and FF of 84.9%, respectively. The MoS 2 plays a promising role to serve as a back surface field (BSF) layer with commendatory band alignment, which provides an opportunity for higher absorption of longer wavelength photons utilizing the tail-states-assisted (TSA) two-step photon upconversion approach. The device has been optimized with respect to the thickness, doping concentration, and defect density of each constituent layer including working temperature and back contact metal work function using SCAPS-1D simulator. This article demonstrates a novel high efficiency ZnS/SnS/MoS 2 dual-heterojunction thin film solar cell. Note: Author names will be searched in the keywords field, also, but that may find papers where the person is mentioned, rather than papers they authored.Use a comma to separate multiple people: J Smith, RL Jones, Macarthur.Use these formats for best results: Smith or J Smith.For best results, use the separate Authors field to search for author names.Use quotation marks " " around specific phrases where you want the entire phrase only.
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