NDLI: 2-Dimensional optoelectronic simulation for nanostructured organic-inorganic hybrid solar cells

Content Provider	IEEE Xplore Digital Library
Author	Yu-Chih Cheng Min-Hsiang Hsu Chi-Kang Li Peichen Yu Yuh-Renn Wu
Copyright Year	2011
Description	Author affiliation: Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 106, Taiwan (Chi-Kang Li; Peichen Yu) \|\| Department of Photonics and Institute of Electro-Optical Engineering, National Chiao-Tung University, Hsinchu 300, Taiwan (Yu-Chih Cheng; Min-Hsiang Hsu; Yuh-Renn Wu)
Abstract	Hybrid solar cells (HSCs) based on a mixture of organic and inorganic semiconductor materials attract a lot of attention owing to the combination of desirable properties of both materials. Due to low exciton diffusion length and light harvesting issues, nanostructures are often employed in HSCs. However, most numerical models over-simplify the complicated bulk heterojunction (BHJ) into a homojunction configuration which losses insights to charge transport. Moreover, designing nanostructures to achieve both light harvesting and carrier collection is essential, but rather complicated. In this work, we develop a methodology based on two-dimensional (2D) optical and electrical simulations which are tailored for the hybrid system. The optical simulation employs a finite-difference time-domain (FDTD) technique to calculate the electromagnetic field and obtain the generation rate in the nanostructure. Next, an electrical calculation is based on a 2D self-consistent drift-diffusion and Poisson solver which uses a finite element method (FEM). As a result, our works allows the analysis of optical and electrical properties of nanostructured heterojunction semiconductor materials. The theoretical approach has been validated for P3HT/PCBM BHJ organic solar cells. In this study, hybrid structures based on Si nanowires (NWs)/ poly(3-hexylthiophene)(P3HT) are used as the hypothetical material system, where an interpenetrating network of rectangular channels consisting of SiNWs and P3HT is assumed. The simulation results show that NWs facilitates transmission and absorption of sunlight inside the photoactive layer. We then investigate the device current-voltage characteristics as a function of the recombination rate, barrier heights of anode and cathode, and structural configuration of interfaces. The theoretical approach also allows the optimization of optical and electrical properties of solar cells with embedded nanostructures or nanoparticles.
Starting Page	002605
Ending Page	002608
File Size	286226
Page Count	4
File Format	PDF
ISBN	9781424499663
ISSN	01608371
e-ISBN	9781424499656
DOI	10.1109/PVSC.2011.6186481
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Silicon Photovoltaic cells Nanostructures Electric fields Mathematical model Absorption
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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