Hybrid Silicon Nanocone–Polymer Solar Cells

Sangmoo Jeong, Erik C. Garnett, Shuang Wang, Zongfu Yu, Shanhui Fan, Mark L. Brongersma, Michael D. McGehee, Yi Cui

Research output: Contribution to journalArticlepeer-review

406 Scopus citations

Abstract

Recently, hybrid Si/organic solar cells have been studied for low-cost Si photovoltaic devices because the Schottky junction between the Si and organic material can be formed by solution processes at a low temperature. In this study, we demonstrate a hybrid solar cell composed of Si nanocones and conductive polymer. The optimal nanocone structure with an aspect ratio (height/diameter of a nanocone) less than two allowed for conformal polymer surface coverage via spin-coating while also providing both excellent antireflection and light trapping properties. The uniform heterojunction over the nanocones with enhanced light absorption resulted in a power conversion efficiency above 11%. Based on our simulation study, the optimal nanocone structures for a 10 μm thick Si solar cell can achieve a short-circuit current density, up to 39.1 mA/cm 2, which is very close to the theoretical limit. With very thin material and inexpensive processing, hybrid Si nanocone/polymer solar cells are promising as an economically viable alternative energy solution. © 2012 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)2971-2976
Number of pages6
JournalNano Letters
Volume12
Issue number6
DOIs
StatePublished - May 3 2012
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KVS-C1-015-21
Acknowledgements: This work is based upon work supported as part of the Center on Nanostructuring for Efficient Energy Conversion (CNEEC) at Stanford University, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Award DE-SC0001060. This work was partially supported by the Center for Advanced Molecular Photovoltaics (CAMP) under Award KVS-C1-015-21, made by King Abdullah University of Science and Technology. S.J. acknowledges support from the Korea Foundation for Advanced Studies (KFAS) for graduate fellowship. S.J. thanks Dr. Theodore I. Kamins and Dr. Jonathan D. Servaites for helpful discussions concerning the device fabrication and data analysis.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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