Journal ArticleDOI
Si nanowires organic semiconductor hybrid heterojunction solar cells toward 10% efficiency.
TLDR
The results suggest that such hybrid cells can potentially be realized using Si thin films instead of bulk substrates, which is promising towards realizing low-cost and high-efficiency SiNWs/organic hybrid solar cells.Abstract:
High-efficiency hybrid solar cells are fabricated using a simple approach of spin coating a transparent hole transporting organic small molecule, 2,2′,7,7′-Tetrakis-(N,N-di-4-methoxyphenylamino)-9,9′-spirobifluorene (Spiro-OMeTAD) on silicon nanowires (SiNWs) arrays prepared by electroless chemical etching. The characteristics of the hybrid cells are investigated as a function of SiNWs length from 0.15 to 5 μm. A maximum average power conversion efficiency of 9.92% has been achieved from 0.35 μm length SiNWs cells, despite a 12% shadowing loss and the absence of antireflective coating and back surface field enhancement. It is found that enhanced aggregations in longer SiNWs limit the cell performance due to increased series resistance and higher carrier recombination in the shorter wavelength region. The effects of the Si substrate doping concentrations on the performance of the cells are also investigated. Cells with higher substrate doping concentration exhibit a significant drop in the incident photons...read more
Citations
More filters
Journal ArticleDOI
Hole Selective MoOx Contact for Silicon Solar Cells
Corsin Battaglia,Xingtian Yin,Xingtian Yin,Xingtian Yin,Maxwell Zheng,Maxwell Zheng,Ian D. Sharp,Teresa Chen,Stephen McDonnell,Angelica Azcatl,Carlo Carraro,Biwu Ma,Roya Maboudian,Robert M. Wallace,Ali Javey,Ali Javey +15 more
TL;DR: This work demonstrates the use of nm-thick transition metal oxides as a simple and versatile pathway for dopant-free contacts to inorganic semiconductors and has important implications toward enabling a novel class of junctionless devices with applications for solar cells, light-emitting diodes, photodetectors, and transistors.
Journal ArticleDOI
Co(III) Complexes as p-Dopants in Solid-State Dye-Sensitized Solar Cells
TL;DR: In this article, two new Co(III) complexes for doping applications were proposed to ameliorate the dopant's suitability for its use in solid-state dye-sensitized solar cells.
Journal ArticleDOI
Recent progress in organic–inorganic hybrid solar cells
TL;DR: In this paper, the progress in state-of-the-art research on organic-inorganic hybrid solar cells and the associated key issues, including the energy band alignment of the organic and inorganic components, interface control of the heterojunction, and the use of ordered nanostructures were discussed.
Journal ArticleDOI
High Efficiency Hybrid Silicon Nanopillar–Polymer Solar Cells
Pushpa Raj Pudasaini,Francisco Ruiz-Zepeda,Manisha Sharma,David Elam,Arturo Ponce,Arturo A. Ayon +5 more
TL;DR: The proposed hybrid solar cell, formed by spin coating the organic polymer PEDOT:PSS on a SiNP array fabricated using metal assisted electroless chemical etching process, is considered to be promising toward the realization of a low-cost, high-efficiency inorganic/organic hybrid solar cells.
References
More filters
Journal ArticleDOI
Hybrid Nanorod-Polymer Solar Cells
TL;DR: It is demonstrated that semiconductor nanorods can be used to fabricate readily processed and efficient hybrid solar cells together with polymers and Tuning the band gap by altering the nanorod radius enabled us to optimize the overlap between the absorption spectrum of the cell and the solar emission spectrum.
Journal ArticleDOI
Coaxial silicon nanowires as solar cells and nanoelectronic power sources
Bozhi Tian,Xiaolin Zheng,Thomas J. Kempa,Ying Fang,Nanfang Yu,Guihua Yu,Jinlin Huang,Charles M. Lieber +7 more
TL;DR: These coaxial silicon nanowire photovoltaic elements provide a new nanoscale test bed for studies of photoinduced energy/charge transport and artificial photosynthesis, and might find general usage as elements for powering ultralow-power electronics and diverse nanosystems.
Journal ArticleDOI
Light Trapping in Silicon Nanowire Solar Cells
Erik C. Garnett,Peidong Yang +1 more
TL;DR: It is demonstrated that ordered arrays of silicon nanowires increase the path length of incident solar radiation by up to a factor of 73, which is above the randomized scattering (Lambertian) limit and is superior to other light-trapping methods.
Journal ArticleDOI
Comparison of the device physics principles of planar and radial p-n junction nanorod solar cells
TL;DR: In this paper, a device physics model for radial p-n junction nanorod solar cells was developed, in which densely packed nanorods, each having a pn junction in the radial direction, are oriented with the rod axis parallel to the incident light direction.
Journal ArticleDOI
Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications
Michael D. Kelzenberg,Shannon W. Boettcher,Jan Petykiewicz,Daniel B. Turner-Evans,Morgan C. Putnam,Emily L. Warren,Joshua M. Spurgeon,Ryan M. Briggs,Nathan S. Lewis,Harry A. Atwater +9 more
TL;DR: The observed absorption enhancement and collection efficiency enable a cell geometry that not only uses 1/100th the material of traditional wafer-based devices, but also may offer increased photovoltaic efficiency owing to an effective optical concentration of up to 20 times.