Transparent Ohmic Contacts for Solution-Processed, Ultrathin CdTe Solar Cells

J. Matthew Kurley; Matthew G. Panthani; Ryan W. Crisp; Sanjini U. Nanayakkara; Gregory F. Pach; Matthew O. Reese; Margaret H. Hudson; Dmitriy S. Dolzhnikov; Vadim Tanygin; Joseph M. Luther; Dmitri V. Talapin

doi:10.1021/acsenergylett.6b00587

Transparent Ohmic Contacts for Solution-Processed, Ultrathin CdTe Solar Cells

J. Matthew Kurley, Matthew G. Panthani, Ryan W. Crisp, Sanjini U. Nanayakkara, Gregory F. Pach, Matthew O. Reese, Margaret H. Hudson, Dmitriy S. Dolzhnikov, Vadim Tanygin, Joseph M. Luther, Dmitri V. Talapin

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

34 Scopus Citations

Abstract

Recently, solution-processing became a viable route for depositing CdTe for use in photovoltaics. Ultrathin (∼500 nm) solar cells have been made using colloidal CdTe nanocrystals with efficiencies exceeding 12% power conversion efficiency (PCE) demonstrated by using very simple device stacks. Further progress requires an effective method for extracting charge carriers generated during light harvesting. Here, we explored solution-based methods for creating transparent Ohmic contacts to the solution-deposited CdTe absorber layer and demonstrated molecular and nanocrystal approaches to Ohmic hole-extracting contacts at the ITO/CdTe interface. We used scanning Kelvin probe microscopy to further show how the above approaches improved carrier collection by reducing the potential drop under reverse bias across the ITO/CdTe interface. Other methods, such as spin-coating CdTe/A₂CdTe₂ (A = Na, K, Cs, N₂H₅), can be used in conjunction with current/light soaking to improve PCE further.

Original language	American English
Pages (from-to)	270-278
Number of pages	9
Journal	ACS Energy Letters
Volume	2
Issue number	1
DOIs	https://doi.org/10.1021/acsenergylett.6b00587 https://doi.org/10.1021/acsenergylett.6b00587
State	Published - 13 Jan 2017

Bibliographical note

Publisher Copyright:
© 2016 American Chemical Society.

NREL Publication Number

NREL/JA-5900-67544

Keywords

CdTe
nanocrystal solar cells
ohmic contacts

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Kurley, J. M., Panthani, M. G., Crisp, R. W., Nanayakkara, S. U., Pach, G. F., Reese, M. O., Hudson, M. H., Dolzhnikov, D. S., Tanygin, V., Luther, J. M., & Talapin, D. V. (2017). Transparent Ohmic Contacts for Solution-Processed, Ultrathin CdTe Solar Cells. ACS Energy Letters, 2(1), 270-278. https://doi.org/10.1021/acsenergylett.6b00587, https://doi.org/10.1021/acsenergylett.6b00587

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abstract = "Recently, solution-processing became a viable route for depositing CdTe for use in photovoltaics. Ultrathin (∼500 nm) solar cells have been made using colloidal CdTe nanocrystals with efficiencies exceeding 12% power conversion efficiency (PCE) demonstrated by using very simple device stacks. Further progress requires an effective method for extracting charge carriers generated during light harvesting. Here, we explored solution-based methods for creating transparent Ohmic contacts to the solution-deposited CdTe absorber layer and demonstrated molecular and nanocrystal approaches to Ohmic hole-extracting contacts at the ITO/CdTe interface. We used scanning Kelvin probe microscopy to further show how the above approaches improved carrier collection by reducing the potential drop under reverse bias across the ITO/CdTe interface. Other methods, such as spin-coating CdTe/A2CdTe2 (A = Na, K, Cs, N2H5), can be used in conjunction with current/light soaking to improve PCE further.",

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AU - Reese, Matthew O.

AU - Hudson, Margaret H.

AU - Dolzhnikov, Dmitriy S.

AU - Tanygin, Vadim

AU - Luther, Joseph M.

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AB - Recently, solution-processing became a viable route for depositing CdTe for use in photovoltaics. Ultrathin (∼500 nm) solar cells have been made using colloidal CdTe nanocrystals with efficiencies exceeding 12% power conversion efficiency (PCE) demonstrated by using very simple device stacks. Further progress requires an effective method for extracting charge carriers generated during light harvesting. Here, we explored solution-based methods for creating transparent Ohmic contacts to the solution-deposited CdTe absorber layer and demonstrated molecular and nanocrystal approaches to Ohmic hole-extracting contacts at the ITO/CdTe interface. We used scanning Kelvin probe microscopy to further show how the above approaches improved carrier collection by reducing the potential drop under reverse bias across the ITO/CdTe interface. Other methods, such as spin-coating CdTe/A2CdTe2 (A = Na, K, Cs, N2H5), can be used in conjunction with current/light soaking to improve PCE further.

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Transparent Ohmic Contacts for Solution-Processed, Ultrathin CdTe Solar Cells

Abstract

Bibliographical note

NREL Publication Number

Keywords

UN SDGs

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