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Solution-Processed Micro-Nanostructured Electron Transport Layer via Bubble-Assisted Assembly for Efficient
Yongrui Yang1,2, Fanyi Min1,2, Yiyang Wang2,3
1Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
Advanced Materials (Deerfield Beach, Fla.)
|September 27, 2024
Summary
Researchers developed a novel tin oxide (SnO2) electron transport layer for perovskite solar cells (PSCs). This innovation enhances charge transport, leading to a certified power conversion efficiency (PCE) of 25.07% for these advanced photovoltaic devices.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- Organic-inorganic halide perovskite solar cells (PSCs) show promise for photovoltaics due to excellent optoelectronic properties and low manufacturing costs.
- A key challenge in PSCs is unbalanced charge carrier diffusion, causing recombination and limiting power conversion efficiency (PCE).
- Inefficient charge carrier collection is a major bottleneck for achieving higher PCE in PSCs.
Purpose of the Study:
- To develop an improved electron transport layer (ETL) for PSCs.
- To address charge carrier recombination and enhance PCE in PSCs.
- To fabricate a solution-processed SnO2 array ETL with tunable micro-nanostructures.
Main Methods:
- Fabrication of a solution-processed SnO2 array electron transport layer using a bubble-template-assisted approach.
- Utilizing the SnO2 array as both an ETL and a scaffold for the perovskite layer.
- Characterization of the micro-nanostructure and optoelectronic properties of the fabricated ETL.
Main Results:
- The fabricated SnO2 array ETL exhibited precisely tunable micro-nanostructures.
- The optimized electron transport pathway and enlarged perovskite grain size were achieved.
- The resulting PSCs demonstrated a high PCE of 25.35% (25.07% certificated PCE).
Conclusions:
- The bubble-template-assisted fabrication of SnO2 arrays offers an effective strategy for developing advanced ETLs in PSCs.
- The developed SnO2 ETL successfully improved charge carrier transport and reduced recombination.
- This work presents a significant advancement in achieving high-performance perovskite solar cells.
