Different Hierarchical Nanostructured Carbons as Counter Electrodes for CdS Quantum Dot Solar Cells

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• 作者：Gouri Sankar Paul ; Jung Ho Kim ; Min-Sik Kim ; Kwangseok Do ; Jaejung Ko ; Jong-Sung Yu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2012
• 出版时间：January 25, 2012
• 年：2012
• 卷：4
• 期：1
• 页码：375-381
• 全文大小：384K
• 年卷期：v.4,no.1(January 25, 2012)
• ISSN：1944-8252

文摘

CdS quantum dot sensitized solar cells based on TiO₂ photoanode and nanostructured carbon as well as Pt as counter electrodes using iodide/triiodide and polysulfide electrolytes were fabricated to improve the efficiency and reduce the cost of solar cells. Compared with conventional Pt (畏 = 1.05%) and CMK-3 (畏 = 0.67%) counter electrodes, hollow core-mesoporous shell carbon (HCMSC) counter electrode using polysulfide electrolyte exhibits much larger incident photon to current conversion efficiency (IPCE = 27%), photocurrent density (J_sc = 4.31 mA.cm^鈥?) and power conversion efficiency (畏 = 1.08%), which is basically due to superb structural characters of HCMSC such as large specific surface area, high mesoporous volume, and 3D interconnected well-developed hierarchical porosity network, which facilitate fast mass transfer with less resistance and enable HCMSC to have highly enhanced catalytic activity toward the reduction of electrolyte shuttle.

Keywords:

mesoporous carbons; electrodes; CdS; quantum dots; solar cells