Recent research led by Xinyi Huang from the School of Energy and Power Engineering at Inner Mongolia University of Technology has unveiled promising advancements in the development of solar cells using antimony selenide (Sb2Se3). The study, published in the journal “Results in Optics,” focuses on enhancing the efficiency of these solar cells, achieving a remarkable power conversion efficiency (PCE) of 25.3%.
One of the main challenges in solar cell technology has been the reliance on cadmium sulfide (CdS) as the electron transport layer (ETL) in Sb2Se3 solar cells. CdS poses environmental concerns due to its toxicity, prompting researchers to seek alternative materials that are both eco-friendly and compatible with Sb2Se3. Huang’s team has proposed an innovative all-inorganic solar cell structure that utilizes molybdenum disulfide (MoS2) as the hole transport layer (HTL) and tungsten disulfide (WS2) as the ETL.
The research utilized SCAPS-1D numerical simulations to optimize the thickness of the Sb2Se3 layer and its hole doping concentration. Huang’s findings indicate that the optimal thickness of Sb2Se3 lies between 0.9 and 1.1 micrometers, with a hole doping concentration ranging from 10^16 to 10^18 cm−3. This careful optimization plays a crucial role in achieving the high efficiency observed in the simulations.
Huang noted, “The spike-like band at the Sb2Se3/WS2 interface can effectively inhibit carrier recombination, leading to a larger open-circuit voltage of 0.69 V.” This characteristic is particularly significant as it suggests that using WS2 instead of CdS not only addresses toxicity concerns but also enhances the performance of the solar cells. The study highlights WS2’s advantages, including a larger built-in potential and increased charge recombination resistance compared to the conventional CdS layer.
The implications of this research extend beyond scientific curiosity; they open commercial opportunities in the renewable energy sector. As the demand for sustainable energy solutions grows, the development of non-toxic, high-efficiency solar cells could position companies involved in solar technology to gain a competitive edge. Manufacturers may find new avenues for innovation by adopting materials like MoS2 and WS2, potentially leading to the production of safer and more efficient solar panels.
In summary, Huang’s research not only contributes to the scientific understanding of Sb2Se3 solar cells but also paves the way for advancements in commercial solar technology. The transition to greener materials could significantly impact the solar energy market, aligning with global sustainability goals and enhancing the appeal of solar power as a viable energy source.
