Sb₂Se₃‐Sensitized Inorganic–Organic Heterojunction Solar Cells Fabricated Using a Single‐Source Precursor

Abstract

The photovoltaic performance of Sb2Se3‐sensitized heterojunction solar cells, which were fabricated by a simple deposition of Sb2Se3 on mesoporous TiO2 by an approach that features multiple cycles of spin coating with a single‐source precursor solution and thermal decomposition, is reported. Poly[2,6‐(4,4‐bis(2‐ethylhexyl)‐4H‐cyclopenta[2,1‐b;3,4‐b′]dithiophene)‐alt‐4,7(2,1,3‐benzothioadiazole)] was used as the hole‐transporting material. The most efficient cell exhibited a short‐circuit current density of 22.3 mA cm−2, an open‐circuit voltage of 304.5 mV, and a fill factor of 47.2 %, yielding a power conversion efficiency of 3.21 % under standard test conditions (irradiation of 1000 W m−2, air mass=1.5 G). The results of this study imply that the developed approach has a high potential as a simple and effective route for the fabrication of efficient and inexpensive solar cells.

Hydrazine solution processed Sb2S3, Sb2Se3 and Sb2(S1−xSex)3 film: molecular precursor identification, film fabrication and band gap tuning

“…Within one year, solution processed Sb 2 Se 3 sensitized solar cells fabricated using a single-source precursor have obtained a power-conversion efficiency (PCE) of 3.21% by Seok’s group3, and superstrate Sb 2 Se 3 solar cells fabricated via thermal evaporation have achieved 3.7% device efficiency by our group6, suggesting the promise of Sb 2 Se 3 for photovoltaic absorber application.…”

“…Recently, antimony selenide (antimonselite, Sb 2 Se 3 ) has been intensively explored as a light-absorbing material for photovoltaic device applications, owing to its simple, low-cost and non-toxic composition, suitable band gap (approximately 1.1 eV) and high optical absorption coefficient of above 10 5  cm −1 at short wavelength12345. Within one year, solution processed Sb 2 Se 3 sensitized solar cells fabricated using a single-source precursor have obtained a power-conversion efficiency (PCE) of 3.21% by Seok’s group3, and superstrate Sb 2 Se 3 solar cells fabricated via thermal evaporation have achieved 3.7% device efficiency by our group6, suggesting the promise of Sb 2 Se 3 for photovoltaic absorber application.…”

A comparative study on the electronic and optical properties of Sb-=SUB=-2-=/SUB=-Se-=SUB=-3-=/SUB=- thin film

“…Various methods have been used to deposit Sb 2 Se 3 thin film such as thermal evaporation [12,15,41], spin coating [42], electrodeposition [43], solvothermal [44] and hydrothermal method [39] etc. To the best of our knowledge, no comparative report is available in literature regarding the theoretical and experimental study.…”

CuSbS2‐Sensitized Inorganic–Organic Heterojunction Solar Cells Fabricated Using a Metal–Thiourea Complex Solution

“…[1][2][3][4][5][6][7] Theoretical and experimental investigations on solar cells based on Sb-Ch have shown their potential as light absorbers. [1][2][3][4]7] For example, we recently achieved a record power conversion efficiency (PCE) of about 7.5 % in Sb 2 S 3 -sensitized solar cells through thioacetamide-assisted surface treatment of Sb 2 S 3 .…”

“…Binary antimony chalcogenides (Sb-Ch), such as Sb 2 S 3 , [1,2] Sb 2 Se 3 , [3,4] and composition-graded Sb 2 (S/Se) 3 , [5] have been successfully applied as light absorbers in both sensitizerarchitecture and planar-type solar cells because of their specific properties, such as suitable band gaps of 1.1-1.7 eV, chemical stability, high absorption coefficients, and environmentally friendly characteristics. [1][2][3][4][5][6][7] Theoretical and experimental investigations on solar cells based on Sb-Ch have shown their potential as light absorbers.…”