Studies of Hydrogenated Amorphous Silicon: A Contract Report

Studies of Hydrogenated Amorphous Silicon: A Contract Report

NREL

Research output: NLR › Subcontract Report

Abstract

This report discusses the results of probing the defect structure and bonding of hydrogenated amorphous silicon films using both nuclear magnetic resonance (NMR) and electron spin resonance (ESR). The doping efficiency of boron in a-Si:H was found to be less than 1%, with 90% of the boron in a threefold coordinated state. On the other hand, phosphorus NMR chemical shift measurements yielded aratio of threefold to fourfold P sites of roughly 4 to 1. Various resonance lines were observed in heavily boron- and phosphorus- doped films and a-SiC:H alloys. These lines were attributed to band tail states on twofold coordinated silicon.

Original language	American English
Publisher	National Laboratory of the Rockies (NLR)
Number of pages	48
State	Published - 1984

Bibliographical note

Work performed by Naval Research Laboratory, Electronics Technology Division, Washington, DC

NLR Publication Number

NREL/STR-211-2393

Keywords

boron
crystal defects
electron spin resonance (ESR)
nuclear magnetic resonance (NMR)
photovoltaic
solar energy

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title = "Studies of Hydrogenated Amorphous Silicon: A Contract Report",

abstract = "This report discusses the results of probing the defect structure and bonding of hydrogenated amorphous silicon films using both nuclear magnetic resonance (NMR) and electron spin resonance (ESR). The doping efficiency of boron in a-Si:H was found to be less than 1\%, with 90\% of the boron in a threefold coordinated state. On the other hand, phosphorus NMR chemical shift measurements yielded aratio of threefold to fourfold P sites of roughly 4 to 1. Various resonance lines were observed in heavily boron- and phosphorus- doped films and a-SiC:H alloys. These lines were attributed to band tail states on twofold coordinated silicon.",

keywords = "boron, crystal defects, electron spin resonance (ESR), nuclear magnetic resonance (NMR), photovoltaic, solar energy",

author = "NREL",

note = "Work performed by Naval Research Laboratory, Electronics Technology Division, Washington, DC",

year = "1984",

language = "American English",

publisher = "National Laboratory of the Rockies (NLR)",

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type = "Other",

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T1 - Studies of Hydrogenated Amorphous Silicon: A Contract Report

AU - NREL, null

N1 - Work performed by Naval Research Laboratory, Electronics Technology Division, Washington, DC

PY - 1984

Y1 - 1984

N2 - This report discusses the results of probing the defect structure and bonding of hydrogenated amorphous silicon films using both nuclear magnetic resonance (NMR) and electron spin resonance (ESR). The doping efficiency of boron in a-Si:H was found to be less than 1%, with 90% of the boron in a threefold coordinated state. On the other hand, phosphorus NMR chemical shift measurements yielded aratio of threefold to fourfold P sites of roughly 4 to 1. Various resonance lines were observed in heavily boron- and phosphorus- doped films and a-SiC:H alloys. These lines were attributed to band tail states on twofold coordinated silicon.

AB - This report discusses the results of probing the defect structure and bonding of hydrogenated amorphous silicon films using both nuclear magnetic resonance (NMR) and electron spin resonance (ESR). The doping efficiency of boron in a-Si:H was found to be less than 1%, with 90% of the boron in a threefold coordinated state. On the other hand, phosphorus NMR chemical shift measurements yielded aratio of threefold to fourfold P sites of roughly 4 to 1. Various resonance lines were observed in heavily boron- and phosphorus- doped films and a-SiC:H alloys. These lines were attributed to band tail states on twofold coordinated silicon.

KW - boron

KW - crystal defects

KW - electron spin resonance (ESR)

KW - nuclear magnetic resonance (NMR)

KW - photovoltaic

KW - solar energy

M3 - Subcontract Report

PB - National Laboratory of the Rockies (NLR)

ER -

Studies of Hydrogenated Amorphous Silicon: A Contract Report

Abstract

Bibliographical note

NLR Publication Number

Keywords

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