Incorporating photon recycling into the analytical drift-diffusion model of high efficiency solar cells

2014 ◽  
Vol 116 (19) ◽  
pp. 194504 ◽  
Author(s):  
Matthew P. Lumb ◽  
Myles A. Steiner ◽  
John F. Geisz ◽  
Robert J. Walters
Keyword(s):  
Solar Cells ◽  
Diffusion Model ◽  
High Efficiency ◽  
Drift Diffusion Model ◽  
Drift Diffusion ◽  
High Efficiency Solar Cells ◽  
Photon Recycling

scholarly journals Insights of Hysteresis Behaviors in Perovskite Solar Cells from a Mixed Drift-Diffusion Model Coupled with Recombination

Photonics ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 47 ◽  
Author(s):  
Chongqiu Yang ◽  
Xiaobiao Shan ◽  
Tao Xie
Keyword(s):  
Solar Cells ◽  
Diffusion Model ◽  
Perovskite Solar Cells ◽  
Negative Ion ◽  
Drift Diffusion Model ◽  
Drift Diffusion ◽  
Perovskite Layer ◽  
Measurement Protocol ◽  
Interfacial Recombination ◽  
Ion Species

Hysteresis in perovskite solar cells is a notorious issue limiting its development in stability, reproducibility and efficiency. Ions’ migration coupled with charges’ recombination are indispensable factors to generate the hysteretic curves on the basis of experimental and theoretical calculation studies, however, the underlying physical characteristics are rarely clarified. Here, a mixed electronic-ionic drift-diffusion model combined with bulk and interfacial recombination is investigated. Positive and negative ion species could drift to and accumulate at interfaces between the perovskite/transport layers, influencing internal electric potential profiles and delaying the charges’ ejection to the transport layers. The charges might recombine spontaneously or trap-assisted, reducing the total amount of electrons and holes collected in the external circuit, leading to a diminished photocurrent. Moreover, our calculations indicate that an appropriate measurement protocol is really essential to evaluate the device performance precisely and to suppress J–V hysteresis. Meanwhile, a negligible hysteretic loop could be obtained by balancing the material properties of the transport layers and restraining the ions mobility in the perovskite layer.

scholarly journals High-Efficiency Ultrathin Si-Based Solar Cells by Cascading Dilute-Nitride GaNAsP

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7415
Author(s):  
Yen-Ju Lin ◽  
David Jui-Yang Feng ◽  
Tzy-Rong Lin
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
High Efficiency ◽  
Power Conversion ◽  
Dilute Nitride ◽  
Drift Diffusion Model ◽  
Drift Diffusion ◽  
Tandem Cell ◽  
Lattice Matched ◽  
Cell Thickness

Thin-film solar cells are currently an important research subject. In this study, a lattice-matched GaNAsP/Si tandem cell was designed. We adopted the drift-diffusion model to analyze the power conversion efficiency (PCE) of the solar cell. To find the maximum solar cell PCE, the recombination terms and the interlayer between subcells was omitted. For an optimal tandem cell PCE, this study analyzed the mole fraction combinations of GaNAsP and the thickness combinations between the GaNAsP and the Si subcells of the tandem cell. Our results showed the superiority of the tandem cell over the Si cell. The 4.5 μm tandem cell had a 12.7% PCE, the same as that of the 10.7 μm Si cell. The 11.5 μm tandem cell had 20.2% PCE, while the 11.5 μm Si cell processed 12.7% PCE. We also analyzed the Si subcell thickness ratio of sub-12 μm tandem cells for maximum PCE. The tandem cell with a thickness between 40% to 70% of a Si cell would have a max PCE. The ratio depended on the tandem cell thickness. We conclude that the lattice-matched GaNAsP/Si tandem cell has potential for ultrathin thin Si-based solar cell applications.

scholarly journals Exploring the Way To Approach the Efficiency Limit of Perovskite Solar Cells by Drift-Diffusion Model

ACS Photonics ◽  
2017 ◽  
Vol 4 (4) ◽  
pp. 934-942 ◽  
Author(s):  
Xingang Ren ◽  
Zishuai Wang ◽  
Wei E. I. Sha ◽  
Wallace C. H. Choy
Keyword(s):  
Solar Cells ◽  
Diffusion Model ◽  
Perovskite Solar Cells ◽  
Drift Diffusion Model ◽  
Drift Diffusion ◽  
The Way
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