Abstract
The power conversion efficiency of perovskite solar cells has risen from as low as 3.8% to as high as 19.3% in just five years with yet a projected value of over 20% in the next few years by experimentalists. Such a tremendous breakthrough is one of its kind in photo-voltaic research with thin film solar cells as the only major competitor. The light harvesting layer in these new devices has a crystalline structure called the perovskite structure which is capable of absorbing photons in both the visible and near infra-red regions of the solar radiation spectrum. In this study, we carried out theoretical studies based on the detailed balance theory originally proposed by Shockley and Queisser, and on a semi-emperical approach based on measured optical absorption spectrum of the three most widely used perovskite absorbers: CH3NH3SnI3 , CH3NH3PbI3 , and CH3NH3PbI3-xClx . We arrived at an upper conversion efficiency limit for a single planar hetero-junction(PHJ) perovskite solar cell with anti-reflection capabilities considering radiative losses as the only carrier loss mechanism within the cell. The limiting efficiency was found to be 29.2% for CH3NH3PbI3 , 27.5% for CH3NH3PbI3-xClx , and 24.8% for CH3NH3SnI3 under AM1.5 solar spectrum. Issues such as the effect of exciton diffusion length and absorber thickness on the efficiency are also discussed.
Chinedu, U (2021). Limiting Efficiency Of Perovskite Solar Cells. Afribary. Retrieved from https://tracking.afribary.com/works/limiting-efficiency-of-perovskite-solar-cells
Chinedu, Ugwuoke "Limiting Efficiency Of Perovskite Solar Cells" Afribary. Afribary, 16 Apr. 2021, https://tracking.afribary.com/works/limiting-efficiency-of-perovskite-solar-cells. Accessed 14 Nov. 2024.
Chinedu, Ugwuoke . "Limiting Efficiency Of Perovskite Solar Cells". Afribary, Afribary, 16 Apr. 2021. Web. 14 Nov. 2024. < https://tracking.afribary.com/works/limiting-efficiency-of-perovskite-solar-cells >.
Chinedu, Ugwuoke . "Limiting Efficiency Of Perovskite Solar Cells" Afribary (2021). Accessed November 14, 2024. https://tracking.afribary.com/works/limiting-efficiency-of-perovskite-solar-cells