研究目的
The rational design of dopant-free organic hole-transporting layer (HTL) materials for high-efficient and stable p-i-n planar perovskite solar cells (pero-SCs).
研究成果
The study successfully designed a π-conjugated small-molecule HTL material with supramolecular interactions and reverse diffusion properties, achieving high PCE and stability in p-i-n planar pero-SCs. The strategy paves the way for high-performance, dopant-free, and printable large-area planar p-i-n pero-SCs.
研究不足
The study focuses on the design and synthesis of HTL materials for p-i-n planar pero-SCs, with limitations including the need for further optimization of the materials for large-scale fabrication and the exploration of other factors affecting device performance in modules.
1：Experimental Design and Method Selection:
The study involved the synthesis of two π-conjugated small-molecule HTL materials, BDT-TPA-sTh and BDT-TPA-sTPA, through tailoring the backbone and conjugated side chain to control molecular conformation. X-ray crystallography was used to analyze the stacking model in solid states.
2：Sample Selection and Data Sources:
The materials were characterized using 1H and 13C NMR spectra, MALDI-TOF mass spectrometry, thermal stability tests, and DSC thermograms.
3：List of Experimental Equipment and Materials:
Instruments included X-ray crystallography, UV-Vis absorption spectroscopy, hole-only devices for mobility measurements, and devices for photovoltaic performance evaluation.
4：Experimental Procedures and Operational Workflow:
The HTL materials were synthesized, characterized, and then used in the fabrication of p-i-n planar pero-SCs. The devices were tested for photovoltaic performance and stability.
5：Data Analysis Methods:
The hole mobility was calculated from the J-V characteristics of hole-only devices. The photovoltaic parameters were extracted from the J-V curves under illumination.
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