Study of anomalous behavior of steady state photoconductivity in highly crystallized undoped microcrystalline Si films

Sanjay K. Ram; Satyendra Kumar; P. Roca i Cabarrocas

doi:10.1016/j.jnoncrysol.2005.12.018

Study of anomalous behavior of steady state photoconductivity in highly crystallized undoped microcrystalline Si films

Sanjay K. Ram
, Satyendra Kumar
, P. Roca i Cabarrocas

Indian Institute of Technology Kanpur

Research output: Contribution to journal › Article › peer-review

Abstract

The photoconductivity (σ_ph) of highly crystallized dense undoped hydrogenated microcrystalline silicon (μc-Si:H) films was measured as a function of light illumination over a wide temperature range (∼15-325 K). A thermal quenching behavior in σ_ph was observed at ∼240 K. The photoconductivity exponent (γ) was found to be sublinear with γ as low as 0.13. A density of states (DOS) profile having a steep conduction band tail, and valence band tail with two distinct distributions was found to be necessary to understand the electronic transport behavior in the inherently heterogeneous μc-Si:H films.

Original language	English
Pages (from-to)	1172-1175
Number of pages	4
Journal	Journal of Non-Crystalline Solids
Volume	352
Issue number	9-20 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.jnoncrysol.2005.12.018
Publication status	Published - 15 Jun 2006

Keywords

Density of states
Electronic transport properties
Photoconductivity
Silicon
Thin films

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10.1016/j.jnoncrysol.2005.12.018

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title = "Study of anomalous behavior of steady state photoconductivity in highly crystallized undoped microcrystalline Si films",

abstract = "The photoconductivity (σph) of highly crystallized dense undoped hydrogenated microcrystalline silicon (μc-Si:H) films was measured as a function of light illumination over a wide temperature range (∼15-325 K). A thermal quenching behavior in σph was observed at ∼240 K. The photoconductivity exponent (γ) was found to be sublinear with γ as low as 0.13. A density of states (DOS) profile having a steep conduction band tail, and valence band tail with two distinct distributions was found to be necessary to understand the electronic transport behavior in the inherently heterogeneous μc-Si:H films.",

keywords = "Density of states, Electronic transport properties, Photoconductivity, Silicon, Thin films",

author = "Ram, \{Sanjay K.\} and Satyendra Kumar and \{Roca i Cabarrocas\}, P.",

year = "2006",

month = jun,

day = "15",

doi = "10.1016/j.jnoncrysol.2005.12.018",

language = "English",

volume = "352",

pages = "1172--1175",

journal = "Journal of Non-Crystalline Solids",

issn = "0022-3093",

number = "9-20 SPEC. ISS.",

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TY - JOUR

T1 - Study of anomalous behavior of steady state photoconductivity in highly crystallized undoped microcrystalline Si films

AU - Ram, Sanjay K.

AU - Kumar, Satyendra

AU - Roca i Cabarrocas, P.

PY - 2006/6/15

Y1 - 2006/6/15

N2 - The photoconductivity (σph) of highly crystallized dense undoped hydrogenated microcrystalline silicon (μc-Si:H) films was measured as a function of light illumination over a wide temperature range (∼15-325 K). A thermal quenching behavior in σph was observed at ∼240 K. The photoconductivity exponent (γ) was found to be sublinear with γ as low as 0.13. A density of states (DOS) profile having a steep conduction band tail, and valence band tail with two distinct distributions was found to be necessary to understand the electronic transport behavior in the inherently heterogeneous μc-Si:H films.

AB - The photoconductivity (σph) of highly crystallized dense undoped hydrogenated microcrystalline silicon (μc-Si:H) films was measured as a function of light illumination over a wide temperature range (∼15-325 K). A thermal quenching behavior in σph was observed at ∼240 K. The photoconductivity exponent (γ) was found to be sublinear with γ as low as 0.13. A density of states (DOS) profile having a steep conduction band tail, and valence band tail with two distinct distributions was found to be necessary to understand the electronic transport behavior in the inherently heterogeneous μc-Si:H films.

KW - Density of states

KW - Electronic transport properties

KW - Photoconductivity

KW - Silicon

KW - Thin films

U2 - 10.1016/j.jnoncrysol.2005.12.018

DO - 10.1016/j.jnoncrysol.2005.12.018

M3 - Article

AN - SCOPUS:33745463182

SN - 0022-3093

VL - 352

SP - 1172

EP - 1175

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

IS - 9-20 SPEC. ISS.

ER -

Study of anomalous behavior of steady state photoconductivity in highly crystallized undoped microcrystalline Si films

Abstract

Keywords

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