ABSTRACT
The development of inexpensive, non-toxic, high efficiency and earth-abundant solar absorbers is critical for terawatt scale implementation of photovoltaics. Cu2SnS3 is a promising earth abundant absorber material that is attracting attention recently for optoelectronic application including photovoltaic solar cells. However, very little is known about the relationship between structural and optical properties such as the absorbance, reflectivity, refractive index, extinction coefficient and energy loss function. These information are however, very essential for the design and fabrication of Cu2SnS3 photovoltaic devices to achieve higher power conversion efficiencies. In this thesis, first-principles calculation based on state-of-the-art methododoly of screened hybrid density functional theory (DFT) have been employed to comprehensively characterize the structural, electronic, and optical properties of Cu2SnS3 material. From band structure analysis, Cu2SnS3 is demonstrated to be a direct band gap materials with a predicted band gap of 0.9 eV, which is in good agreement with available experimental values of 0.9 - 1.3 eV. It is evident from the calculated partial density of states (PDOS) that the anti-bonding Cu-d, Sn-p and S-p states are involved in the transition from valence to conduction band. On the basis of the calculated optical absorbance (in the order 105 cm−1 ), reflectivity (approx. 23%), refractive index (approx. 2.90) and extinction coefficient and energy loss function, Cu2SnS3 is demonstrated to be an attractive non-toxic, earth-abundant, and costeffective material for scalable thin-film PV applications.
ODOGUJE, I (2021). Structural, Electronic And Optical Properties Of Cu2SnS3 Solar Absorber: A First-Principle Density Functional Theory Investigation. Afribary. Retrieved from https://afribary.com/works/structural-electronic-and-optical-properties-of-cu2sns3-solar-absorber-a-first-principle-density-functional-theory-investigation
ODOGUJE, ISYAKU "Structural, Electronic And Optical Properties Of Cu2SnS3 Solar Absorber: A First-Principle Density Functional Theory Investigation" Afribary. Afribary, 13 Apr. 2021, https://afribary.com/works/structural-electronic-and-optical-properties-of-cu2sns3-solar-absorber-a-first-principle-density-functional-theory-investigation. Accessed 21 Dec. 2024.
ODOGUJE, ISYAKU . "Structural, Electronic And Optical Properties Of Cu2SnS3 Solar Absorber: A First-Principle Density Functional Theory Investigation". Afribary, Afribary, 13 Apr. 2021. Web. 21 Dec. 2024. < https://afribary.com/works/structural-electronic-and-optical-properties-of-cu2sns3-solar-absorber-a-first-principle-density-functional-theory-investigation >.
ODOGUJE, ISYAKU . "Structural, Electronic And Optical Properties Of Cu2SnS3 Solar Absorber: A First-Principle Density Functional Theory Investigation" Afribary (2021). Accessed December 21, 2024. https://afribary.com/works/structural-electronic-and-optical-properties-of-cu2sns3-solar-absorber-a-first-principle-density-functional-theory-investigation