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Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
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Small Molecule-Polymer Composite Hole-Transporting Layer for Highly Efficient and Stable Perovskite Solar Cells
Jin-Miao Wang1, Zhao-Kui Wang1, Meng Li1
1Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , Suzhou, Jiangsu 215123, China.
ACS Applied Materials & Interfaces
|March 24, 2017
Summary
A new composite hole-transporting material (HTM) combining PEDOT:PSS and TS-CuPc enhances perovskite solar cell (PSC) performance and stability. This optimized HTM improves efficiency, crystallization, and reduces device degradation.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Effective and stable hole-transporting materials (HTMs) are critical for high-performance planar perovskite solar cells (PSCs).
- Existing HTMs often face challenges related to stability, efficiency, and compatibility with perovskite layers.
Purpose of the Study:
- To develop a solution-processed composite HTM for planar PSCs.
- To enhance hole transport, extraction, and perovskite crystallization.
- To improve the stability and reduce degradation of PSC devices.
Main Methods:
- Fabrication of a composite HTM using poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) and copper phthalocyanine-3,4',4″,4‴-tetrasulfonated acid tetrasodium salt (TS-CuPc) at optimized doping ratios.
- Characterization of the composite HTM's properties, including hole transport, crystallization effects, and interaction with indium tin oxide (ITO).
- Fabrication and testing of planar PSC devices incorporating the composite HTM.
Main Results:
- The composite HTM significantly enhanced hole transport and extraction efficiency.
- Improved perovskite crystallization and reduced indium tin oxide erosion were observed.
- A champion PSC device achieved a power conversion efficiency (PCE) of 17.29%, with a short-circuit current (JSC) of 22.23 mA/cm2, open-circuit voltage (VOC) of 1.01 V, and a fill factor (FF) of 77%.
- Enhanced cell stability was demonstrated.
Conclusions:
- The developed composite HTM offers a promising strategy for fabricating efficient and stable planar PSCs.
- The optimized doping ratio of PEDOT:PSS and TS-CuPc is key to achieving superior device performance and longevity.
- This composite HTM serves as an effective anode interfacial layer for advanced perovskite solar cell applications.
