期刊
MICRO & NANO LETTERS
卷 13, 期 1, 页码 131-134出版社
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/mnl.2017.0477
关键词
organic-inorganic hybrid materials; lead compounds; thin films; thin film devices; nanorods; solar cell arrays; titanium compounds; annealing; grain size; surface morphology; ultraviolet spectra; visible spectra; infrared spectra; photovoltaic effects; photoconductivity; high-crystallinity thin films; large-grain thin films; PbI2 center dot dimethyl sulphoxide complex thin films; annealing temperature; annealing time; glove box; relative humidity; surface morphology; optical absorption; photovoltaic performance; nanorod array perovskite solar cells; grain size; photoelectric conversion efficiency; temperature 100 degC to 140 degC; time 10 min; TiO2
资金
- National Natural Science Foundation of China [51472071, 51272061]
- Hefei University of Technology [75010-037004, 75010-037003]
The high-crystallinity, large-grain and full-coverage CH3NH3PbI3 thin films are successfully prepared by converting the PbI(2)dimethyl sulphoxide (DMSO) complex thin films at the optimum annealing temperature and time of 140 degrees C and 10 min in the glove box with the relative humidity of 10-15%. The influence of the annealing temperature and time on the crystallinity, surface morphology, optical absorption of CH3NH3PbI3 thin films is systematically investigated and the photovoltaic performance of the corresponding TiO2 nanorod array perovskite solar cells is evaluated. The results reveal that the crystallinity of CH3NH3PbI3 thin films can be improved and their grain sizes gradually increase from 200-300 to 300-500 and 500-800 nm with the increase of the annealing temperature from 100 to 120 and 140 degrees C. The TiO2 nanorod array perovskite solar cells with the optimum annealing temperature and time of 140 degrees C and 10 min exhibit the best photoelectric conversion efficiency (PCE) of 16.11% and the average PCE of 15.62 +/- 0.49%.
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