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Updated: Sep 23, 2025
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
Totally room-temperature solution-processing method for fabricating flexible perovskite solar cells using an
Jun Jiang1, Shubo Wang1, Xuguang Jia1
1School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology, Changzhou University Changzhou 213164 Jiangsu China dingjn@cczu.edu.cn nyyuan@cczu.edu.cn.
This study introduces niobium oxide (Nb2O5) as an additive to titanium dioxide (TiO2) electron transport layers for flexible perovskite solar cells. This innovation enhances efficiency and enables room-temperature, solution-based fabrication for portable electronics.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- Flexible perovskite solar cells (PSCs) are crucial for portable electronics.
- Achieving high power conversion efficiency (PCE) with low-temperature processing remains a challenge.
- Efficient charge collection layers are vital for PSC performance.
Purpose of the Study:
- To develop a novel electron transport layer (ETL) for flexible PSCs.
- To improve PCE using a low-temperature, solution-based fabrication method.
- To investigate the effect of niobium oxide (Nb2O5) on TiO2 ETLs.
Main Methods:
- Incorporation of niobium ethoxide as a precursor additive to TiO2 nanoparticles (NCs).
- Fabrication of Nb2O5-TiO2 ETLs via a room-temperature solution-processing method.
- Preparation of uniform perovskite films using an annealing-free solution-based technique.
Main Results:
- Nb2O5 addition significantly enhanced electron mobility and electrical conductivity of ETLs.
- Annealing-free fabrication yielded uniform perovskite films with smooth surfaces.
- Suppression of charge recombination and improved time-resolved photoluminescence were observed.
- Achieved PCEs of 15.25% on rigid substrates and 13.60% on flexible PET substrates.
Conclusions:
- The Nb2O5-TiO2 ETL facilitates high-performance flexible PSCs.
- Room-temperature solution processing is viable for efficient flexible solar cell fabrication.
- This approach offers a promising pathway for lightweight, flexible energy solutions.
