• Title/Summary/Keyword: $TiO_2$powder

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Light Scattering Effect Based Silica in Dye-sensitized $TiO_2$ Photovoltaic Cells ($TiO_2$ 광전극의 광산란 특성을 이용한 염료감응형 태양전지)

  • Wang, Jiao;Jin, En Mei;Zhao, Xingguan;Park, Kyung-Hee;Gu, Hal-Bon;Park, Bok-Kee
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2010.06a
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    • pp.213-213
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    • 2010

  • In this thesis, we studied to increased to solar conversion efficiency of DSSC (dye-sensitized solar cell) using nanocrystalline $TiO_2$ semiconductor. We are preparation of $TiO_2$ photoelectrode, assembly the DSSC and put a focus in analyses electrochemical properties of DSSC and using Silica powder in $TiO_2$ photoelectrode for increase light scattering effect and improved conversion efficiency. It attempt to investigate the morphology of the photoelectrode and photovoltaic effects using field emission scanning electron microscopy (FE-SEM) and photovoltaic properties under illumination with AM 1.5 simulated sunlight. We got 146 % enhanced power conversion efficiency when the optimal content of quartz glass powder was 5 wt.% than that another content.

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Effect. of $TiO_2$ and PZT powder additions on the Ag/Pd Electrode for Step-down Multilayer Piezoelectric Transformer (적충 강압형 압전변압기 Ag/Pd 전극의 $TiO_2$ 와 PZT 분말의 첨가에 따른 효과연구)

  • Joo, Hyeon-Kyu;Kim, In-Sung;Vo, Vietthang;Jeong, Soon-Jong;Kim, Min-Soo;Song, Jae-Sung
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2010.06a
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    • pp.334-334
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    • 2010

  • In order to fabricate the multilayer piezoelectric transformer by tape casting method, we investigated the effect of $TiO_2$ and PZT powder additions on the Ag/Pd electrode. Meanwhile, effects of $TiO_2$ and PZT powder additives on the microstructure and electrical properties of Ag/Pd electrode were investigated in detail. In addition, the multilayer piezoelectric transformers were fabricated and the characteristics with various load resistance were measured at resonance frequency. The voltage step-up ratio was continuously change with increasing input voltage and load resistance, and then output voltage and powers were increased with increasing input voltage at matching impedance. The temperature rise of multilayer piezoelectric transformers were increased with increasing input voltage and load resistance. Meanwhile, multilayer piezoelectric transformers sintered at $1100^{\circ}C$ show the favorable characteristics with a power of 15 W at $100\;{\Omega}$.

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Comparison Study of Compact Titanium Oxide (c-TiO2) Powder Electron Transport Layer Fabrication for Carbon Electrode-based Perovskite Solar Cells (탄소전극 기반 페로브스카이트 태양전지 적용을 위한 조밀 이산화티타늄 분말 전자수송층 제작 비교 연구)

  • Woo, Chae Young;Lee, Hyung Woo
    • Journal of Powder Materials
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    • v.29 no.4
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    • pp.297-302
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    • 2022

  • This study compares the characteristics of a compact TiO2 (c-TiO2) powdery film, which is used as the electron transport layer (ETL) of perovskite solar cells, based on the manufacturing method. Additionally, its efficiency is measured by applying it to a carbon electrode solar cell. Spin-coating and spray methods are compared, and spray-based c-TiO2 exhibits superior optical properties. Furthermore, surface analysis by scanning electron microscopy (SEM) and atomic force microscopy (AFM) exhibits the excellent surface properties of spray-based TiO2. The photoelectric conversion efficiency (PCE) is 14.31% when applied to planar perovskite solar cells based on metal electrodes. Finally, carbon nanotube (CNT) film electrode-based solar cells exhibits a 76% PCE compared with that of metal electrode-based solar cells, providing the possibility of commercialization.

  • https://doi.org/10.4150/KPMI.2022.29.4.297 인용 PDF KSCI

Study on the Powder Synthesis of $BaTiO_3$ and its Dielectric Properties (초소형 캐패시터용 $BaTiO_3$분말합성 및 소결특성에 관한 연구)

  • 문흥수;박병규;이태근;김철긴;이석근
    • Korean Journal of Crystallography
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    • v.10 no.1
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    • pp.56-65
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    • 1999

  • 수열법을 이용하여 미세한 BaTiO3 분말을 합성하였다. Ti원으로 두 종류의 TiO2 gel을 사용하였으며 그 크기와 모양을 BaTiO3 합성에 주는 영향을 고찰하였다. 구형의 단분산 TiO2 gel을 사용하여 Ba(NO3)2 수용액에서 수열 합성한 BaTiO3 분말은 입자크기도 균일하였으며 응집이 일어나지 않아않았다. 비교적 낮은 pH에서 구형 TiO2 gel을 사용하여 합성한 BaTiO3 분말은 구형을 그대로 유지하였지만 높은 pH에서 합성한 BaTiO3 분말은 그 구형이 분해되었다. KOH양이 많아지고, 합성시간이 길어짐에 따라 합성된 BaTiO3 분말의 크기는 커졌으며 그 c/a 값도 증가하였다.

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