Jointly Tuned Plasmonic鈥揈xcitonic Photovoltaics Using Nanoshells
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- 作者：Daniel Paz-Soldan ; Anna Lee ; Susanna M. Thon ; Michael M. Adachi ; Haopeng Dong ; Pouya Maraghechi ; Mingjian Yuan ; Andr茅 J. Labelle ; Sjoerd Hoogland ; Kun Liu ; Eugenia Kumacheva ; Edward H. Sargent
- 刊名：Nano Letters
- 出版年：2013
- 出版时间：April 10, 2013
- 年：2013
- 卷：13
- 期：4
- 页码：1502-1508
- 全文大小：405K
- 年卷期：v.13,no.4(April 10, 2013)
- ISSN：1530-6992
文摘
Recent advances in spectrally tuned, solution-processed plasmonic nanoparticles have provided unprecedented control over light鈥檚 propagation and absorption via engineering at the nanoscale. Simultaneous parallel progress in colloidal quantum dot photovoltaics offers the potential for low-cost, large-area solar power; however, these devices suffer from poor quantum efficiency in the more weakly absorbed infrared portion of the sun鈥檚 spectrum. Here, we report a plasmonic鈥揺xcitonic solar cell that combines two classes of solution-processed infrared materials that we tune jointly. We show through experiment and theory that a plasmonic鈥揺xcitonic design using gold nanoshells with optimized single particle scattering-to-absorption cross-section ratios leads to a strong enhancement in near-field absorption and a resultant 35% enhancement in photocurrent in the performance-limiting near-infrared spectral region.