Simultaneous Examination of Grain-Boundary Potential, Recombination, and Photocurrent in CdTe Solar Cells Using Diverse Nanometer-Scale Imaging

Chun Sheng Jiang; Helio Moutinho; John Moseley; Joel Duenow; Eric Colegrove; Chuanxiao Xiao; Wyatt Metzger; Mowafak Al-Jassim; Ana Kanevce

doi:10.1109/PVSC.2017.8366391

Simultaneous Examination of Grain-Boundary Potential, Recombination, and Photocurrent in CdTe Solar Cells Using Diverse Nanometer-Scale Imaging

Chun Sheng Jiang, Helio Moutinho, John Moseley, Joel Duenow, Eric Colegrove, Chuanxiao Xiao, Wyatt Metzger, Mowafak Al-Jassim, Ana Kanevce

Materials Science

Research output: Contribution to conference › Paper

Abstract

We report on the simultaneous measurements of Kelvin probe force microscopy (KPFM), cathodoluminescence (CL), and electron-beam induced current (EBIC) for hundreds of grain boundaries (GBs) after different processing steps. The GB potential steadily increases from tens of mV for as-deposited samples, 80 mV after the Cl treatment, to about 120 mV after Cu diffusion (Cl+Cu). The latter is consistent with the emergence of deep Cu defects observed in CL GB spectra. At the same time, EBIC indicates that GB photocurrent is enhanced by 0% to 50% after Cu is introduced. However, this increase is very modest relative to expectations based on computational modeling and the measured GB potential. The EBIC enhancement coincides with increased GB recombination observed by CL. A plausible explanation is that GB defects introduce GB potentials and increase GB recombination; this can reconcile the CL, EBIC, and KPFM data.

Original language	American English
Pages	1312-1316
Number of pages	5
DOIs	https://doi.org/10.1109/PVSC.2017.8366391
State	Published - 2018
Event	2017 IEEE 44th Photovoltaic Specialist Conference (PVSC) - Washington, D.C. Duration: 25 Jun 2017 → 30 Jun 2017

Conference

Conference	2017 IEEE 44th Photovoltaic Specialist Conference (PVSC)
City	Washington, D.C.
Period	25/06/17 → 30/06/17

NREL Publication Number

NREL/CP-5K00-67772

Keywords

cathodoluminescence
CdTe solar cell
electron-beam induced current
grain boundary
Kelvin probe force microscopy

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10.1109/PVSC.2017.8366391

Cite this

Jiang, C. S., Moutinho, H., Moseley, J., Duenow, J., Colegrove, E., Xiao, C., Metzger, W., Al-Jassim, M., & Kanevce, A. (2018). Simultaneous Examination of Grain-Boundary Potential, Recombination, and Photocurrent in CdTe Solar Cells Using Diverse Nanometer-Scale Imaging. 1312-1316. Paper presented at 2017 IEEE 44th Photovoltaic Specialist Conference (PVSC), Washington, D.C.. https://doi.org/10.1109/PVSC.2017.8366391

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title = "Simultaneous Examination of Grain-Boundary Potential, Recombination, and Photocurrent in CdTe Solar Cells Using Diverse Nanometer-Scale Imaging",

abstract = "We report on the simultaneous measurements of Kelvin probe force microscopy (KPFM), cathodoluminescence (CL), and electron-beam induced current (EBIC) for hundreds of grain boundaries (GBs) after different processing steps. The GB potential steadily increases from tens of mV for as-deposited samples, 80 mV after the Cl treatment, to about 120 mV after Cu diffusion (Cl+Cu). The latter is consistent with the emergence of deep Cu defects observed in CL GB spectra. At the same time, EBIC indicates that GB photocurrent is enhanced by 0% to 50% after Cu is introduced. However, this increase is very modest relative to expectations based on computational modeling and the measured GB potential. The EBIC enhancement coincides with increased GB recombination observed by CL. A plausible explanation is that GB defects introduce GB potentials and increase GB recombination; this can reconcile the CL, EBIC, and KPFM data.",

keywords = "cathodoluminescence, CdTe solar cell, electron-beam induced current, grain boundary, Kelvin probe force microscopy",

author = "Jiang, {Chun Sheng} and Helio Moutinho and John Moseley and Joel Duenow and Eric Colegrove and Chuanxiao Xiao and Wyatt Metzger and Mowafak Al-Jassim and Ana Kanevce",

year = "2018",

doi = "10.1109/PVSC.2017.8366391",

language = "American English",

pages = "1312--1316",

note = "2017 IEEE 44th Photovoltaic Specialist Conference (PVSC) ; Conference date: 25-06-2017 Through 30-06-2017",

}

Jiang, CS, Moutinho, H, Moseley, J, Duenow, J , Colegrove, E, Xiao, C, Metzger, W, Al-Jassim, M & Kanevce, A 2018, 'Simultaneous Examination of Grain-Boundary Potential, Recombination, and Photocurrent in CdTe Solar Cells Using Diverse Nanometer-Scale Imaging', Paper presented at 2017 IEEE 44th Photovoltaic Specialist Conference (PVSC), Washington, D.C., 25/06/17 - 30/06/17 pp. 1312-1316. https://doi.org/10.1109/PVSC.2017.8366391

TY - CONF

T1 - Simultaneous Examination of Grain-Boundary Potential, Recombination, and Photocurrent in CdTe Solar Cells Using Diverse Nanometer-Scale Imaging

AU - Jiang, Chun Sheng

AU - Moutinho, Helio

AU - Moseley, John

AU - Duenow, Joel

AU - Colegrove, Eric

AU - Xiao, Chuanxiao

AU - Metzger, Wyatt

AU - Al-Jassim, Mowafak

AU - Kanevce, Ana

PY - 2018

Y1 - 2018

N2 - We report on the simultaneous measurements of Kelvin probe force microscopy (KPFM), cathodoluminescence (CL), and electron-beam induced current (EBIC) for hundreds of grain boundaries (GBs) after different processing steps. The GB potential steadily increases from tens of mV for as-deposited samples, 80 mV after the Cl treatment, to about 120 mV after Cu diffusion (Cl+Cu). The latter is consistent with the emergence of deep Cu defects observed in CL GB spectra. At the same time, EBIC indicates that GB photocurrent is enhanced by 0% to 50% after Cu is introduced. However, this increase is very modest relative to expectations based on computational modeling and the measured GB potential. The EBIC enhancement coincides with increased GB recombination observed by CL. A plausible explanation is that GB defects introduce GB potentials and increase GB recombination; this can reconcile the CL, EBIC, and KPFM data.

AB - We report on the simultaneous measurements of Kelvin probe force microscopy (KPFM), cathodoluminescence (CL), and electron-beam induced current (EBIC) for hundreds of grain boundaries (GBs) after different processing steps. The GB potential steadily increases from tens of mV for as-deposited samples, 80 mV after the Cl treatment, to about 120 mV after Cu diffusion (Cl+Cu). The latter is consistent with the emergence of deep Cu defects observed in CL GB spectra. At the same time, EBIC indicates that GB photocurrent is enhanced by 0% to 50% after Cu is introduced. However, this increase is very modest relative to expectations based on computational modeling and the measured GB potential. The EBIC enhancement coincides with increased GB recombination observed by CL. A plausible explanation is that GB defects introduce GB potentials and increase GB recombination; this can reconcile the CL, EBIC, and KPFM data.

KW - cathodoluminescence

KW - CdTe solar cell

KW - electron-beam induced current

KW - grain boundary

KW - Kelvin probe force microscopy

U2 - 10.1109/PVSC.2017.8366391

DO - 10.1109/PVSC.2017.8366391

M3 - Paper

SP - 1312

EP - 1316

T2 - 2017 IEEE 44th Photovoltaic Specialist Conference (PVSC)

Y2 - 25 June 2017 through 30 June 2017

ER -

Simultaneous Examination of Grain-Boundary Potential, Recombination, and Photocurrent in CdTe Solar Cells Using Diverse Nanometer-Scale Imaging

Abstract

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Keywords

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