Presentation Details
| Robust IZO Top Contacts with Silver Interlayer for Bifacial Perovskite Solar Cells Anuj kumar Palariya1, Anurag Dehingia2, Sai Kaarthik1, Sushobhan Avasthi2, Satish Patil1. 1Solid State and Structural Chemistry Unit (SSCU), Indian Institute of Science (IISc), Bangalore, India.2Centre for Nano Science and Engineering (CeNSE), Indian Institute of Science (IISc), Bangalore, India |
Abstract
Bifacial transparent conductive oxide (TCO) top contacts represent a compelling pathway to enhance perovskite solar module performance by harvesting light from both front and rear surfaces. However, integrating sputtered TCOs on thermally sensitive perovskites and organic layers presents a formidable challenge: energetic ion bombardment during magnetron sputtering causes severe surface decomposition and interface defect formation, rendering conventional transparent contact approaches impractical. We address this fundamental materials physics problem through an integrated three-pronged strategy: (1) optimized sputtering geometry that extends the target–substrate distance from 5 cm to 19 cm, enabling ion thermalization via gas-phase collisions before substrate impact; (2) a nanometric 3 nm silver interlayer that serves as a sacrificial energy absorber, dissipating residual ion kinetic energy as phonons rather than propagating collision cascades into the perovskite; and (3) high-voltage dc magnetron deposition (435 V, 0.19 A) with optimized argon flow (6 sccm) that maintains dense, conductive IZO films (70 Ω/sq, 95% transmittance). The optimised device achieves 19.7% power conversion efficiency, recovering 96% of the opaque silver baseline (20.53%), while simultaneously enabling bifacial operation with rear-side PCE of 14.62% and bifacial factor of 72.21%. These results establish practical, scalable protocols for transparent top contacts essential for advancing bifacial perovskite modules and tandem architectures toward commercial viability. Keywords: perovskite solar cells; bifacial design; transparent contacts; sputtering damage; ion thermalization; tandem photovoltaics
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.
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.
Content Locked. Log into a registered attendee account to access this presentation.