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Thermal-assisted ph...
Thermal-assisted photo-annealed TiO2 thin films for perovskite solar cells fabricated under ambient air
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- Lee, Minho (author)
- Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea.
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- Park, Ik Jae (author)
- Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 08826, South Korea.;Seoul Natl Univ, Res Inst Adv Mat RIAM, Seoul 08826, South Korea.
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- Jeong, Heesu (author)
- Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea.
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- Kim, Byeong Jo (author)
- Uppsala universitet,Fysikalisk kemi
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- Yun, Yeonghun (author)
- Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea.
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- Kim, Hae Jin (author)
- Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 08826, South Korea.
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- Cho, Hanbyeol (author)
- Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea.
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- Lee, Sangwook (author)
- Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea.
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Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 08826, South Korea.;Seoul Natl Univ, Res Inst Adv Mat RIAM, Seoul 08826, South Korea. (creator_code:org_t)
- ELSEVIER, 2020
- 2020
- English.
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In: Applied Surface Science. - : ELSEVIER. - 0169-4332 .- 1873-5584. ; 530
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- We report herein a facile process for the fabrication of amorphous TiO2 thin films under ambient atmosphere using thermal-assisted UV-annealing (similar to 125 degrees C). The TiO2 films were prepared via spin-coating titanium diisopropoxide bis(acetylacetonate) precursor and sequential photo-annealing at various temperatures. Additional soft annealing during the UV-annealing altered the surface chemical states and electrical band structures of the amorphous TiO2 films. The UV-annealing at room temperature leads to a higher conduction band minimum level of the film and a smaller amount of hydroxyl group at the film surface, compared to the thermal-assisted (100-250 degrees C) UV-annealing or the thermal-only annealing (500 degrees C). Effects of the temperature during the UV-annealing process on photovoltaic properties were investigated by fabricating planar heterojunction perovskite cells with methylammonium lead triiodide under ambient atmosphere. At higher temperature of 100-150 degrees C, compared to room temperature, fill factor and power conversion efficiency were enhanced, and hysteresis in current-voltage curves were reduced. Impedance analysis demonstrates that the capacitance is significantly reduced, leading to suppressed hysteresis of the perovskite solar cells. Finally, we achieved a power-conversion efficiency of 20.36% (for the reverse scan) and a stabilized power output of 18.57% from a 125 degrees C -photo-annealed TiO2-based device.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Keyword
- Photo-annealing
- Amorphous TiO2
- Band structure
- Perovskite solar cells
Publication and Content Type
- ref (subject category)
- art (subject category)
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