Three-Dimensional Core鈥揝hell Hybrid Solar Cells via Controlled in Situ Materials Engineering

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• 作者：Giacomo Mariani ; Yue Wang ; Ping-Show Wong ; Andrew Lech ; Chung-Hong Hung ; Joshua Shapiro ; Sergey Prikhodko ; Maher El-Kady ; Richard B. Kaner ; Diana L. Huffaker
• 刊名：Nano Letters
• 出版年：2012
• 出版时间：July 11, 2012
• 年：2012
• 卷：12
• 期：7
• 页码：3581-3586
• 全文大小：406K
• 年卷期：v.12,no.7(July 11, 2012)
• ISSN：1530-6992

文摘

Three-dimensional core鈥搒hell organic鈥搃norganic hybrid solar cells with tunable properties are demonstrated via electropolymerization. Air-stable poly(3,4-ethylenedioxythiophene) (PEDOT) shells with controlled thicknesses are rapidly coated onto periodic GaAs nanopillar arrays conformally, preserving the vertical 3D structure. The properties of the organic layer can be readily tuned in situ, allowing for (1) the lowering of the highest occupied molecular orbital level (|螖E| 0.28 eV), leading to the increase of open-circuit voltage (V_OC), and (2) an improvement in PEDOT conductivity that results in enhanced short-circuit current densities (J_SC). The incorporation of various anionic dopants in the polymer during the coating process also enables the tailoring of the polymer/semiconductor interface transport properties. Systematic tuning of the device properties results in a J_SC of 13.6 mA cm^鈥?, V_OC of 0.63 V, peak external quantum efficiency of 58.5%, leading to a power conversion efficiencies of 4.11%.

Keywords:

Nanowire; lectrodeposition&qsSearchArea=searchText">electrodeposition; ls+engineering&qsSearchArea=searchText">materials engineering; hybrid; lar+cell&qsSearchArea=searchText">solar cell; lymer&qsSearchArea=searchText">conducting polymer