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Published on: September 8, 2017
Diindolotriazatruxene-Based Hole-Transporting Materials for High-Efficiency Planar Perovskite Solar Cells
Xiang-Chun Li1, Yong-Guang Tu2, Cheng Meng1
1Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts & Telecommunications , 9 Wenyuan Road , Nanjing 210023 , China.
Novel hole-transporting materials (HTMs) based on diindolotriazatruxene (DIT) offer efficient performance in perovskite solar cells. These DIT-based HTMs demonstrate promising results for cost-effective, high-efficiency solar cell fabrication.
Area of Science:
- Materials Science
- Organic Chemistry
- Renewable Energy
Background:
- Hole-transporting materials (HTMs) are crucial for efficient perovskite solar cell (PSC) performance.
- Developing cost-effective and high-performance HTMs remains a key challenge in PSC research.
Purpose of the Study:
- To design and synthesize novel HTMs based on a π-extended diindolotriazatruxene (DIT) core.
- To evaluate the performance of these DIT-based HTMs in planar perovskite solar cells.
Main Methods:
- Facile two-step synthesis of DIT-based compounds from inexpensive precursors.
- Characterization using cyclic voltammetry to determine highest occupied molecular orbital (HOMO) energy levels.
- Time-resolved photoluminescence and device performance testing in planar PSCs.
Main Results:
- Synthesized DIT-based HTMs exhibit suitable HOMO energy levels for efficient hole injection.
- Achieved a notable power conversion efficiency of 18.21% in planar PSCs using DIT-based HTM (D2).
- Performance is competitive with devices utilizing standard Spiro-OMeTAD.
Conclusions:
- DIT-based compounds are promising, cost-effective HTMs for high-efficiency planar PSCs.
- The facile synthesis and purification process contribute to low-cost solution processing.
- These materials offer a viable alternative for next-generation perovskite solar technologies.
