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6. Ultrathin Bifacial Passivated Emitter and Rear Cell with Inverted Pyramid Textures

Author

Xiaomin Song, Wenzhong Shen, Shi Chengjing, Borong Sang, Zengguang Huang, Xiangyang Kong, Sihua Zhong, Fan Yuan, and Yuhua Gu

Subjects
Materials science, business.industry, Materials Chemistry, Optoelectronics, Surfaces and Interfaces, Inverted pyramid, Electrical and Electronic Engineering, Condensed Matter Physics, business, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Common emitter
Published
2021

7. Ultrathin Bifacial Passivated Emitter and Rear Cell with Inverted Pyramid Textures.

Author

Shi, Chengjing, Fan, Yuan, Gu, Yuhua, Sang, Borong, Zhong, Sihua, Kong, Xiangyang, Shen, Wenzhong, Song, Xiaomin, and Huang, Zengguang

Subjects
*SOLAR cells, *PHOTOVOLTAIC power systems, *SILICON solar cells, *PYRAMIDS, *ANTIREFLECTIVE coatings, *OPEN-circuit voltage, *MATERIALS texture, *SHORT-circuit currents
Abstract

Wafer thinning is a crucial technique for high‐efficiency solar cells. Herein, an inverted pyramid (IP) texture is prepared on a 35 μm‐thick flexible silicon (Si) wafer with a standard area of 156 × 156 mm2. Based on the experimental results, an ultrathin bifacial passivated emitter and rear cell (PERC) with IP textures using PC1D simulation is designed. The influence of wafer thickness, IP texture, bifacial structure, thickness of the antireflection coating, and doping concentration on device performance is investigated. The results show that the ultrathin IP‐based bifacial PERC possesses better output performance than the traditional cell. Finally, a simulated maximum efficiency of 23.44% is obtained using PC1D software, with an open‐circuit voltage of 0.7127 V and a short‐circuit current of 9.272 A. This ultrathin PERC with IP textures provides an effective way to improve the efficiency of ultrathin silicon solar cells. [ABSTRACT FROM AUTHOR]

Published
2022
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