Title
Strategies for realizing high-efficiency silicon heterojunction solar cells
Author
Zhao, Y. (TU Delft Photovoltaic Materials and Devices)
Procel Moya, P.A. (TU Delft Photovoltaic Materials and Devices) 
Han, C. (TU Delft Photovoltaic Materials and Devices)
Cao, L. (TU Delft Photovoltaic Materials and Devices)
Yang, G. (TU Delft Photovoltaic Materials and Devices)
Özkol, E. (TU Delft Photovoltaic Materials and Devices)
Alcañiz, Alba
Kovačević, K. (TU Delft Electrical Engineering, Mathematics and Computer Science)
Limodio, G. (TU Delft QN/Kavli Nanolab Delft)
Santbergen, R. (TU Delft Photovoltaic Materials and Devices)
Smets, A.H.M. (TU Delft Photovoltaic Materials and Devices)
Weeber, A.W. (TU Delft Photovoltaic Materials and Devices; TNO)
Zeman, M. (TU Delft Electrical Sustainable Energy)
Mazzarella, L. (TU Delft Photovoltaic Materials and Devices)
Isabella, O. (TU Delft Photovoltaic Materials and Devices)
Faculty
Electrical Engineering, Mathematics and Computer Science
Department
Electrical Sustainable Energy
Date
2023
Abstract
Silicon heterojunction (SHJ) solar cells have achieved a record efficiency of 26.81% in a front/back-contacted (FBC) configuration. Moreover, thanks to their advantageous high VOC and good infrared response, SHJ solar cells can be further combined with wide bandgap perovskite cells forming tandem devices to enable efficiencies well above 33%. In this study, we present strategies to realize high-efficiency SHJ solar cells through combined theoretical and experimental studies, starting from the optimization of Si-based thin-film layers to the implementation of electrodes with reduced indium and silver usage. Advanced opto-electrical simulations, which enable comprehensive theoretical understandings of the main physical mechanisms governing carriers’ collection and light management, provide clear pathways for device designs and experimental optimizations. We present the fabricated FBC-SHJ solar cells in both monofacial and bifacial configurations with the best efficiencies of 24.18% and 23.25%, respectively. We point out that to achieve optimum device performance, the compositional materials should be holistically optimized and evaluated as part of the contact stacks with adjacent layers. As an outlook beyond the classical FBC-SHJ solar cell architecture, we propose various novel SHJ-based solar cell architectures. Their potential performance was assessed and compared via rigorous opto-electrical simulations and a maximal efficiency of 27.60% was simulated for FBC-SHJ solar cells featuring localized contacts.
To reference this document use:
http://resolver.tudelft.nl/uuid:87e10b67-06b1-4627-9a6b-84a194999c3e
DOI
https://doi.org/10.1016/j.solmat.2023.112413
ISSN
0927-0248
Source
Solar Energy Materials & Solar Cells, 258
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2023 Y. Zhao, P.A. Procel Moya, C. Han, L. Cao, G. Yang, E. Özkol, Alba Alcañiz, K. Kovačević, G. Limodio, R. Santbergen, A.H.M. Smets, A.W. Weeber, M. Zeman, L. Mazzarella, O. Isabella