skip to main content

SciTech ConnectSciTech Connect

Title: Float-Zone and Czochralski Crystal Growth and Diagnostic Solar Cell Evaluation of a New Solar-Grade Feedstock Source: Preprint

This conference paper describes the Czochralski (CZ) and float-zone (FZ) crystals were grown from experimental solar-grade silicon (SOG-Si) feedstock materials developed by Crystal Systems. The materials were metallurgical-grade Si and highly boron-doped p-type electronic-grade Si (EG-Si) reject material, both of which were gaseous melt-treated to remove boron. Crystal growth observations, lifetime and impurity characterization of the grown crystals, and device performance of wafers from them are presented. Devices made directly on treated high-B EG-Si feedstock have a little over half the efficiency of devices made from control CZ samples. However, devices on CZ and FZ crystals grown from the treated high-B EG-Si feedstock have comparable PV performance (14.0% and 13.8% efficiency, respectively) to that of CZ control samples (14.1%).
Authors:
; ; ;
Publication Date:
OSTI Identifier:
15006972
Report Number(s):
NREL/CP-520-31442
TRN: US200412%%541
DOE Contract Number:
AC36-99-GO10337
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 May 2002; Related Information: Prepared for the 29th IEEE PV Specialists Conference, 20-24 May
Research Org:
National Renewable Energy Lab., Golden, CO (US)
Sponsoring Org:
US Department of Energy (US)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; BORON; CRYSTAL GROWTH; EFFICIENCY; EVALUATION; LIFETIME; PERFORMANCE; SILICON; SOLAR CELLS; SOLAR ENERGY PV; CZOCHRALSKI (CZ); FLOAT-ZONE (FZ) CRYSTAL; SOLAR-GRADE SILICON (SOG-SI); ELECTRONIC GRADE SI (EG-SI); NORMANSKI PHOTOMICROGRAPH; FOURIER TRANSFORM INFRARED SPECTROSCOPY (FTIR); GLOW-DISCHARGE MASS SPECTROSCOPY (GDMS); QUANTUM EFFICIENCY; MICROCRYSTALLINE GROWTH; SOLAR ENERGY - PHOTOVOLTAICS