Significant increase in efficiency and limited toxicity of a solar cell based on Sb₂Se₃ with SnO₂ as a buffer layer

Abstract

A Sb2Se3 device based on SnO2 with the highest efficiency has been obtained by adding ultrathin CdS between the FTO and SnO2 film.

Boosting VOC of antimony chalcogenide solar cells: A review on interfaces and defects

“…As inserting an ultrathin CdS layer between the FTO and SnO 2 film, the carrier concentration is improved and the interface defects are suppressed. [ 78 ] The better CBO and the passivation effect of the ultrathin CdS layer boosted PCE from 2.33% to 5.27% ( Figure 9 A, B). Recently, an evaporation‐processed CeO 2 was employed with CdS as double ETL in Sb 2 Se 3 solar cells.…”

“…Reproduced with permission. [ 78 ] Copyright 2019, The Royal Society of Chemistry. C, Schematic of the Mo‐coated glass covered by Sb 2 Se 3 nanorod arrays and completed Sb 2 Se 3 /CdS core/shell nanorod array solar cells.…”

“…B, Energy-level schematic of the SnO 2 /CdS/CdS-SnO 2 /Sb 2 Se 3 . Reproduced with permission [78]. Copyright 2019, The Royal Society of Chemistry.…”

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.…”

“…Interface engineering was also conducted in Sb 2 Se 3 devices as attempts have been made by introducing additional buffer layers to passivate defects at the heterojunction. [9,18,23] However, it is widely accepted that a perfected light absorber layer still plays the most important role in Sb 2 Se 3 photovoltaics.…”