NDLI: Profile and interface control of hybrid organic-silicon nanorod solar cells

Content Provider	IEEE Xplore Digital Library
Author	Yu-Cheng Chen Yi-Cheng Lin Liang-Chian Yu Peichen Yu
Copyright Year	2015
Description	Author affiliation: Dept. of Photonics, Nat. Chiao-Tung Univ., Hsinchu, Taiwan (Yu-Cheng Chen; Yi-Cheng Lin; Liang-Chian Yu; Peichen Yu)
Abstract	Hybrid organic-silicon solar cells are promising candidates for next-generation photovoltaics due to their low fabrication cost and scalable roll-to-roll processes. However, the power conversion efficiency (PCE) cannot compete with those of traditional silicon solar cells yet mostly due to surface reflection and interface recombination losses. In this work, we investigate the sidewall profile and interface defects of silicon nanorod templates, fabricated by means of polystyrene lithography, followed by metal-assisted chemical etch (MACE), for hybrid photovoltaics. The control of nanorod sidewall profile is important to organic surface coverage, as well as optical absorption for thin-silicon substrates, whereas the control of interface defects is important to boost the open-circuit voltage of hybrid devices. We systematically compared the optical and electrical characteristics of hybrid organic- silicon nanorod (Si NR) devices made with different noble metal etching catalysts: gold (Au) and silver (Ag), which result in different surface morphologies. The preliminary results show that Si NRs made of Ag catalysts have lower interface defects than those of Au catalysts. After passivated by $10nm-Al_{2}O_{3},$ the minority carrier lifetime is 157 μsec (Ag) versus 29 μsec (Au). Moreover, a PCE of 11.9% is achieved with the hybrid solar cells using Ag catalysts without any post-etching surface treatment, where the short-circuit current is as high as >34 $mA/cm_{2}$ enhanced by the nearly periodical pillar arrangement. The Si NR template made with Au catalysts requires further damage removal etch (DRE), which also lead to a high PCE of 11.37% and Jsc of ~ 34 $mA/cm_{2}.$ Currently optimization of device structure and fabrication technique is still in process and more experimental and simulation data will be presented.
Starting Page	1
Ending Page	3
File Size	1124500
Page Count	3
File Format	PDF
e-ISBN	9781479979448
DOI	10.1109/PVSC.2015.7355735
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-06-14
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Silicon Gold Integrated optics Optical device fabrication Optical imaging Optical reflection nanostructure heterojunction hybrid solar cell metal-assisted chemical etching
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in