https://scholars.lib.ntu.edu.tw/handle/123456789/395682
Title: | Hierarchical i-p and i-n porous heterojunction in planar perovskite solar cells | Authors: | Liao, H.-C. Tsao, C.-S. Jao, M.-H. Shyue, J.-J. Hsu, C.-P. Huang, Y.-C. Tian, K.-Y. Chen, C.-Y. Su, C.-J. Su, W.-F. WEI-FANG SU |
Issue Date: | 2015 | Journal Volume: | 3 | Journal Issue: | 19 | Start page/Pages: | 10526-10535 | Source: | Journal of Materials Chemistry A | Abstract: | A hierarchical pore network in planar CH3NH3PbI3 perovskite is demonstrated herein. Quantitative characterizations by grazing incidence small angle X-ray scattering (GISAXS) with modeling and complementary microscopic observations provide insight at various length scales. It is a pore structure comprised of nano-scaled primary pores aggregating into meso-scaled fractal networks within the perovskite layer. Its structural evolution and mechanistic interpretation are explored with respect to different preparation methods/steps. The time-of-flight secondary ion mass spectrometer (TOF-SIMS) results suggest the infiltration of hole transporting materials (HTM) or electron transporting materials (ETM) deposited on top at different length scales. The inter-penetrating perovskite/HTM or perovskite/ETM form i-p or i-n one-sided porous heterojunctions, respectively, over the typically regarded planar-stacked heterojunction. They show distinctive photovoltaic characteristics and behaviors in which the large i-n interfaces at the nanoscale lead to highly efficient, hysteresis-free and reliable solar cell devices. The morphology-performance correlation is helpful for associated design of device architecture and processing toward higher efficiency and stability. © 2015 The Royal Society of Chemistry. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84928947371&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/395682 |
DOI: | 10.1039/c5ta02184g | SDG/Keyword: | Characterization; Fractal dimension; Heterojunctions; Nanostructured materials; Perovskite; Secondary ion mass spectrometry; Solar power generation; X ray scattering; Electron transporting materials; Grazing incidence small-angle X-ray scattering; Hole-transporting materials; Mechanistic interpretations; Microscopic observations; Photovoltaic characteristics; Quantitative characterization; Secondary ion mass spectrometers; Solar cells |
Appears in Collections: | 材料科學與工程學系 |
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