High Performance Carbon-based Planar Solar Cells by Hot-pressing Approach
Yongyue Yu a, Yang Yang a, Hongxia Wang a
a School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Australia, George Street, 2, Brisbane City, Australia
Proceedings of International Conference on Advanced Light Absorbing Materials for Next Generation Photovoltaics (ABSOGEN)
Online, Spain, 2020 November 17th - 18th
Organizers: Hongxia Wang, Xiaojing Hao and Lydia Wong
Poster, Yongyue Yu, 022
Publication date: 6th November 2020
ePoster: 

In order to improve the efficiency and simplify the fabrication method of carbon electrode for planar perovskite solar cells (C-PSCs), a simple yet effective method based on hot-pressing has been developed to press a free-standing carbon film onto adjacent hole transport layer (HTL). The conductivity of the carbon electrode was found to be enhanced by over ten-fold and the adhesion between carbon film and HTL be dramatically strengthened resulted from thermoplasticity of as-prepared carbon film. An optimised pressing temperature (80℃) was applied to the fabrication process achieving 15.3% of photocurrent conversion efficiency (PCE) for CuSCN-based C-PSCs. The PCE is 70% higher than the device without heating at the same pressing pressure. After being stored in a humid environment (55-70%) without encapsulation over 80 days, the device still demonstrated 93% performance retention. Therefore, this facile fabrication process of C-PSCs paves a way to facilitate commercialisation of the new PV technology. 

The authors thanks the financial support by Australian Research council (ARC)  through a discovery project (DP190102252)

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