skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Decoupling Thin Film CdTe Growth from Packaging: Toward Record Specific Power in Low Cost Polycrystalline PV: Preprint

Abstract

There are critical material and scientific barriers to producing high efficiency, flexible, lightweight solar cells that maximize specific power in a cost-effective manner. GaAs solar cells produce the highest specific power of any photovoltaic (PV) technology due to their low weight and extremely high efficiency, but they are also among the most expensive to produce. This work explores a novel lift-off approach with thin-film solar cells, particularly CdTe, to achieve high specific power at low costs. Thin-film devices can be delaminated from their heavy, glass growth substrates post-growth by exploiting a mismatch in coefficient of thermal expansion between the two. This allows thin-film PV to be decoupled from high temperature growth requirements and repackaged using lightweight materials. Currently, the most consistent method of achieving complete delamination of CdTe films is to apply a glass handle at the back contact of the device using epoxy and submerge it in liquid nitrogen. By Tthen re-depositing a transparent front contact but be re-deposited and selectively etcheding to expose the back contact to produce, a functioning lifted-off devices have been produced. Effects of delamination and contributions to device functionality from CdCl2 and CdS layers are discussed. Reproducible delamination of high efficiency, thin-film solar cellsmore » over large areas will enable work to further improve device efficiency through passivation and reconstruction of the previously buried interface between the transparent contact and CdS.« less

Authors:
 [1];  [1];  [1];  [1];  [2];  [1]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  2. Colorado School of Mines
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
OSTI Identifier:
1471658
Report Number(s):
NREL/CP-5K00-68786
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at the 2017 IEEE Photovoltaic Specialists Conference (PSVC), 25-30 June 2017, Washington, D.C.
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; CdTe; delamination; CdS

Citation Formats

McGott, Deborah L, Kempe, Michael D, Dabney, Matthew S, Barnes, Teresa M, Wolden, Colin, and Reese, Matthew O. Decoupling Thin Film CdTe Growth from Packaging: Toward Record Specific Power in Low Cost Polycrystalline PV: Preprint. United States: N. p., 2018. Web.
McGott, Deborah L, Kempe, Michael D, Dabney, Matthew S, Barnes, Teresa M, Wolden, Colin, & Reese, Matthew O. Decoupling Thin Film CdTe Growth from Packaging: Toward Record Specific Power in Low Cost Polycrystalline PV: Preprint. United States.
McGott, Deborah L, Kempe, Michael D, Dabney, Matthew S, Barnes, Teresa M, Wolden, Colin, and Reese, Matthew O. Fri . "Decoupling Thin Film CdTe Growth from Packaging: Toward Record Specific Power in Low Cost Polycrystalline PV: Preprint". United States. https://www.osti.gov/servlets/purl/1471658.
@article{osti_1471658,
title = {Decoupling Thin Film CdTe Growth from Packaging: Toward Record Specific Power in Low Cost Polycrystalline PV: Preprint},
author = {McGott, Deborah L and Kempe, Michael D and Dabney, Matthew S and Barnes, Teresa M and Wolden, Colin and Reese, Matthew O},
abstractNote = {There are critical material and scientific barriers to producing high efficiency, flexible, lightweight solar cells that maximize specific power in a cost-effective manner. GaAs solar cells produce the highest specific power of any photovoltaic (PV) technology due to their low weight and extremely high efficiency, but they are also among the most expensive to produce. This work explores a novel lift-off approach with thin-film solar cells, particularly CdTe, to achieve high specific power at low costs. Thin-film devices can be delaminated from their heavy, glass growth substrates post-growth by exploiting a mismatch in coefficient of thermal expansion between the two. This allows thin-film PV to be decoupled from high temperature growth requirements and repackaged using lightweight materials. Currently, the most consistent method of achieving complete delamination of CdTe films is to apply a glass handle at the back contact of the device using epoxy and submerge it in liquid nitrogen. By Tthen re-depositing a transparent front contact but be re-deposited and selectively etcheding to expose the back contact to produce, a functioning lifted-off devices have been produced. Effects of delamination and contributions to device functionality from CdCl2 and CdS layers are discussed. Reproducible delamination of high efficiency, thin-film solar cells over large areas will enable work to further improve device efficiency through passivation and reconstruction of the previously buried interface between the transparent contact and CdS.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {9}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: