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High-Efficiency Carbon Perovskite Solar Cells via Cathode Interface Engineering by using CuPc Hole-Transporting
Zohreh Zaman1, Hashem Shahroosvand1, Sebastiano Bellani2,3
1Group for Molecular Engineering of Advanced Functional Materials (GMA), Chemistry Department, University of Zanjan, Zanjan, Iran.
Angewandte Chemie (International Ed. in English)
|January 17, 2025
Summary
Cu (II) phthalocyanine (CuPc) enhances carbon perovskite solar cells (C-PSCs) by improving interface contacts. This breakthrough achieves high power conversion efficiency (PCE) and excellent stability, paving the way for commercial viability.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Carbon perovskite solar cells (C-PSCs) offer promising stability but suffer from poor interface contacts with carbon electrodes.
- This limits their performance compared to PSCs with metallic electrodes.
Purpose of the Study:
- To enhance the performance and stability of C-PSCs by optimizing the interface between the carbon electrode and the perovskite layer.
- To investigate Cu (II) phthalocyanine (CuPc) as a hole-transporting material (HTM) for C-PSCs.
Main Methods:
- Computational studies and VASP calculations were used to understand the coordination between CuPc and the perovskite layer.
- Systematic optimization of CuPc HTL solution concentration and screening of carbon electrode types (carbon black:graphite and reduced graphene oxide).
Main Results:
- A maximum power conversion efficiency (PCE) of 21.4% was achieved with an optimized CuPc HTL.
- The C-PSCs demonstrated good thermal stability (less than 20% PCE loss after 200 hours at 85°C) and shelf-life stability (1.3% PCE loss over 20 days).
Conclusions:
- CuPc effectively improves interface contacts in C-PSCs, bridging the performance gap with metallic electrode PSCs.
- The developed C-PSCs exhibit a competitive combination of high efficiency and operational stability, advancing commercialization prospects.
