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Interrelation between processing condition, morphology, crystal orientation and efficiency of CH3NH3PbI3-based perovskite solar cells
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Bae, Seunghwan | en |
dc.contributor.author | Han, Seung Jin | - |
dc.contributor.author | Shin, Tae Joo | - |
dc.contributor.author | Jo, Won Ho | - |
dc.date.accessioned | 2016-03-07T08:47:29Z | - |
dc.date.available | 2017-07-30T16:42:25Z | - |
dc.date.issued | 2015-12-15 | - |
dc.identifier.citation | 2015 International Chemical Congress of Pacific Basin Societies | - |
dc.identifier.uri | https://hdl.handle.net/10371/95649 | - |
dc.description.abstract | The power conversion efficiency of organic-inorganic perovskite has dramatically been increased for the past few years. Until now, the most widely used method to fabricate perovskite films for photovoltaic applications is one-step deposition owing to its cost-effective, simple and easy fabrication. However, uncontrolled solidification of perovskite crystals during the one-step deposition very often results in poor-quality films with low surface coverage. Herein, we report a simple method to fabricate high-quality CH3NH3PbI3 film for high efficiency perovskite solar cells. The tree-like morphology with many pinholes is formed when the film is fabricated by the conventional one-step deposition as described in previous report, where the solidification takes place during spin-coating due to solvent evaporation accompanied by crystallization. However, when the spin-coating time is shorten so as to avoid the solidification during spin-coating in this study, CH3NH3PbI3 is crystallized during post heat-treatment, resulting in flower-like morphology without pinhole. In-situ OM and XRD experiments reveal that the solidification during spin-coating arises from the formation of CH3NH3I–PbI2–solvent complex, which induces the nucleation of CH3NH3PbI3 crystals followed by crystal growth in one-dimensional direction. The crystal growth in one-dimensional direction yields tree-like morphology with many pinholes in CH3NH3PbI3 perovskite film, resulting in very low PCEs of solar cell devices. However, when the solidification during spin-coating is suppressed by shortening the spin-coating time and thereafter CH3NH3PbI3 is crystallized directly from the wet film by post heat-treatment, the flower-like morphology is developed in the film with high surface coverage. Especially, the film from DMSO solution showing the flower-like morphology with good coverage has large-sized crystals on the length scale of tens of micrometers and the crystals in the film are highly orientated along (112) or (200) directions, resulting in a high PCE of 13.85%. | - |
dc.language.iso | en | - |
dc.publisher | PACIFICHEM | - |
dc.title | Interrelation between processing condition, morphology, crystal orientation and efficiency of CH3NH3PbI3-based perovskite solar cells | en |
dc.type | Conference Paper | - |
dc.contributor.AlternativeAuthor | 배승환 | - |
dc.contributor.AlternativeAuthor | 한승진 | - |
dc.contributor.AlternativeAuthor | 신태주 | - |
dc.contributor.AlternativeAuthor | 조원호 | - |
dc.description.srnd | OAIID:oai:osos.snu.ac.kr:snu2015-01/104/0000001236/13 | - |
dc.description.srnd | ADJUST_YN:N | - |
dc.description.srnd | EMP_ID:A004558 | - |
dc.description.srnd | DEPT_CD:445 | - |
dc.description.srnd | CITE_RATE:0 | - |
dc.description.srnd | FILENAME:_?_댄?ㅽ?1217_하와이학회_배승환.pdf | - |
dc.description.srnd | DEPT_NM:재료공학부 | - |
dc.description.srnd | CONFIRM:Y | - |
dc.identifier.srnd | 2015-01/104/0000001236/13 | - |
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