Related Experiment Video
Updated: Mar 29, 2026
08:12
Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
Published on: September 8, 2017
10.2K
Triazatruxene-Based Hole Transporting Materials for Highly Efficient Perovskite Solar Cells
Kasparas Rakstys, Antonio Abate, M Ibrahim Dar
1Department of Solid State Electronics, Vilnius University , Sauletekio 9, Vilnius 10222, Lithuania.
Journal of the American Chemical Society
|December 3, 2015
Summary
New star-shaped hole transporting materials (HTMs) based on triazatruxene were synthesized for perovskite solar cells. These materials offer efficient hole injection and achieve over 18% power conversion efficiency, showing promise for next-generation solar technology.
Area of Science:
- Materials Science
- Renewable Energy
- Organic Chemistry
Background:
- Perovskite solar cells (PSCs) are a promising photovoltaic technology.
- Efficient hole transporting materials (HTMs) are crucial for PSC performance.
- Current HTMs like spiro-OMeTAD face challenges in cost and stability.
Purpose of the Study:
- To synthesize novel star-shaped triazatruxene-based HTMs.
- To evaluate their performance in perovskite solar cells.
- To compare their efficiency with established HTMs.
Main Methods:
- Facile synthesis of four center symmetrical star-shaped HTMs with triazatruxene core and methoxy-engineered side arms.
- Fabrication of (FAPbI3)0.85(MAPbBr3)0.15 perovskite solar cells using the synthesized HTMs.
- Characterization of electronic properties (HOMO levels) and charge transfer dynamics (time-resolved photoluminescence).
Main Results:
- Synthesized HTMs possess suitable HOMO levels aligning with perovskite valence band.
- Time-resolved photoluminescence showed more efficient hole injection compared to spiro-OMeTAD.
- A power conversion efficiency exceeding 18% was achieved with one of the novel HTMs (KR131).
Conclusions:
- Triazatruxene-based compounds represent a new, efficient class of HTMs for PSCs.
- The developed HTMs are synthesized from inexpensive materials using facile procedures.
- These findings pave the way for fabricating highly efficient and potentially more stable perovskite solar cells.
