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• W2006507996 abstract "나노다공성 <TEX>$TiO_2$</TEX> 필름은 주로 염료감응형 태양전지의 작동전극으로 사용된다. 지금까지 염료감응형 태양전지의 광전환효율을 높이기 위해 <TEX>$TiO_2$</TEX> 나노구조체에 대한 다양한 연구가 시도되어왔다. 본 연구에서는 수열합성법을 이용하여 FTO glass 위에 루타일 <TEX>$TiO_2$</TEX> 나노로드를 수직적으로 성장시켰고 그 위에 아나타제 <TEX>$TiO_2$</TEX> 필름을 재 합성하였다. 이 새로운 방법은 아나타제 <TEX>$TiO_2$</TEX> 합성시 요구되는 시드층 합성단계를 피할 수 있었다. 밀집한 아나타제 <TEX>$TiO_2$</TEX> 층은 전자생성층으로써 고안되었고 시드층 대신 합성된 루타일 <TEX>$TiO_2$</TEX> 나노로드는 생성된 전자들이 FTO glass로 이동하는 통로역할을 하게 되었다. 전자이동률을 증진시키기 위해 루타일 나노로드에 <TEX>$TiCl_4$</TEX> 수용액을 이용하여 표면 처리하였고 열처리 후 표면 위에 얇은 아나타제 <TEX>$TiO_2$</TEX> 필름을 형성시켰다. 합성된 루타일-아나타제 <TEX>$TiO_2$</TEX> 구조체의 두께는 <TEX>$4.5-5.0{mu}m$</TEX>이고 셀 테스트 결과 3.94%의 광전환효율을 얻게 되었다. 이는 루타일 <TEX>$TiO_2$</TEX> 나노로드 전극과 비교했을 때 광전환효율이 상당히 향상되는 것을 확인할 수 있었다. Nanoporous <TEX>$TiO_2$</TEX> films are commonly used as working electrodes in dye-sensitized solar cells (DSSCs). So far, there have been attempts to synthesize films with various <TEX>$TiO_2$</TEX> nanostructures to increase the power-conversion efficiency. In this work, vertically aligned rutile <TEX>$TiO_2$</TEX> nanorods were grown on fluorinated tin oxide (FTO) glass by hydrothermal synthesis, followed by deposition of an anatase <TEX>$TiO_2$</TEX> film. This new method of anatase <TEX>$TiO_2$</TEX> growth avoided the use of a seed layer that is usually required in hydrothermal synthesis of <TEX>$TiO_2$</TEX> electrodes. The dense anatase <TEX>$TiO_2$</TEX> layer was designed to behave as the electron-generating layer, while the less dense rutile nanorods acted as electron-transfer pathwaysto the FTO glass. In order to facilitate the electron transfer, the rutile phase nanorods were treated with a <TEX>$TiCl_4$</TEX> solution so that the nanorods were coated with the anatase <TEX>$TiO_2$</TEX> film after heat treatment. Compared to the electrode consisting of only rutile <TEX>$TiO_2$</TEX>, the power-conversion efficiency of the rutile-anatase hybrid <TEX>$TiO_2$</TEX> electrode was found to be much higher. The total thickness of the rutile-anatase hybrid <TEX>$TiO_2$</TEX> structures were around <TEX>$4.5-5.0{mu}m$</TEX>, and the highest power efficiency of the cell assembled with the structured <TEX>$TiO_2$</TEX> electrode was around 3.94%." @default.
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• W2006507996 date "2014-09-30" @default.
• W2006507996 modified "2023-09-27" @default.
• W2006507996 title "Preparationand Characterization of Rutile-anatase Hybrid TiO2Thin Film by Hydrothermal Synthesis" @default.
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• W2006507996 doi "https://doi.org/10.7464/ksct.2014.20.3.306" @default.
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