Dear Muhammad Umair

Please check these papers , i hope its help you

Sincerely

See attached files

Dear Muhammad Umair,

Perhaps, here below is the link to the article and the article's abstract you're looking for:

https://www.researchgate.net/post/I_need_research_paper_related_to_study_of_Band_gap_engineering_of_Sn_doped_CdTe_anyone_guide

• DOI:10.1088/1361-6463/50/3/035501
• Corpus ID: 125299175

Sn-doped CdTe as promising intermediate-band photovoltaic material

• M. A. Flores, E. Menéndez-Proupin, +1 author J. Peña
• Published 25 January 2017
• Physics, Materials Science
• Journal of Physics D: Applied Physics

The formation energies, charge transition levels and quasiparticle defect states of several tin-related impurities are investigated within the DFT + GW formalism. The optical spectrum obtained from the solution of the Bethe–Salpeter equation shows that the absorption strongly increases in the sub-bandgap region after doping, suggesting a two-step photoexcitation process that facilitates transitions from photons with insufficient energy to cause direct transitions from the valence to the conduction band via an intermediate-band. We propose Sn-doped CdTe as a promising candidate for the development of high-efficiency solar cells, which could potentially overcome the Shockley–Queisser limit. Collapse