研究目的
Investigating the growth of thin MAPbI3 crystal wafers on aqueous solution surfaces for efficient lateral-structure perovskite solar cells.
研究成果
A thin OIHP single-crystal growth method was developed, achieving record PCE up to 5.9% for lateral-structure OHIP single-crystal solar cell devices without poling treatment.
研究不足
The current device efficiency is still much lower than the vertical-structure perovskite thin film solar cells, possibly due to surface and interfacial charge recombination.
1：Experimental Design and Method Selection:
A bottom-up technique for growing wafer-size hybrid perovskite multiple crystals directly from aqueous solution was developed.
2：Sample Selection and Data Sources:
Single-crystalline hybrid perovskite wafers with centimeter size were grown at the top surface of a perovskite precursor solution.
3：List of Experimental Equipment and Materials:
Precursor solution prepared from lead(II) acetate trihydrate, hydriodic acid, and methylamine.
4：Experimental Procedures and Operational Workflow:
The precursor solution was preheated and stirred, then crystals were grown by adjusting the evaporation rate of water.
5：Data Analysis Methods:
XRD, SEM, absorption spectrum, and TRPL measurements were used to analyze the crystal quality and device performance.
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Bruker-AXS D8 Discover Diffractometer
Equipped with the high-sensitivity 2D Vantec 500 area detector
Bruker
XRD spectra measurement
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Lead(II) acetate trihydrate
99%
Alfa Aesar
Precursor for perovskite crystal growth
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Hydriodic acid
57% w/w aq. soln.
Alfa Aesar
Precursor for perovskite crystal growth
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Methylamine
40% w/w aq. soln.
Alfa Aesar
Precursor for perovskite crystal growth
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Quanta 200 FEG ESEM
Not specified
FEI
SEM imaging
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LAMBDA 1050 UV–vis–NIR Spectrophotometer
Not specified
PerkinElmer
Absorption spectra measurement
-
iHR320 Photoluminescence Spectroscopy
Not specified
Horiba
PL spectrum measurement
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Horiba Delta Pro time-correlated single photon counting system
Not specified
Horiba
TRPL measurement
-
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