Presentation Details
| Rollable flexible thin silicon heterojunction (SHJ) solar cells for space applications Zhengxin Liu1, 2, Wenzhu Liu1, 2, Fanying Meng1, Liping Zhang1, Wenjie Zhao1, Qiang Shi1, Jianhua Shi1, 2, Anjun Han1, 2, Junlin Du1, 2. 1Shanghai Institute of Microsystem and Information Technology (SIMIT) Chinese Academy of Sciences, Shanghai, China.26T Solar Co., Ltd., Shanghai, China |
Abstract
Crystalline silicon solar cells have attracted increasing interests for the booming commercial low and middle orbit constellations. In this paper, silicon heterojunction (SHJ) solar cell with front emitter are prepared on commercial thin p-type silicon wafers. The thickness of silicon wafer is 60 – 80 mm. The electrical contacts are formed with conventional screen-printing metallization for low-cost issue. An edge smoothing technology is applied to produce flexible solar cells, where the pyramids on the V-shape channels at the cell’s edges are blunt and smoothed to rounded U-shape channels, this strategy disperses the stress and reduces the maximum stress by about one order, enabling the solar cells more resistive to wafer deformation and frequent vibrations. When encapsulated into large modules, they exhibit a rolling manner similarly to thin-film modules made from a-Si and perovskites. the least critical bending radius is less than 5 cm, which enables Roll-Out Solar Arrays (ROSA). The conversion efficiency is over 22% at AM0 illumination. The electron irradiation resistance is characterized before and after 1MeV electrons irradiations, the cells’ improvement pathways is discussed.
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No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author.
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