High-performance thermoelectric silver selenide thin films cation exchanged from a copper selenide template

Nan Chen; Michael R. Scimeca; Shlok J. Paul; Shihab B. Hafiz; Dong Kyun Ko; Ayaskanta Sahu

High-performance thermoelectric silver selenide thin films cation exchanged from a copper selenide template

Nan Chen, Michael R. Scimeca, Shlok J. Paul, Shihab B. Hafiz, Dong Kyun Ko, Ayaskanta Sahu

Electrical and Computer Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Ag₂Se has potentially excellent thermoelectric (TE) performance as an n-type semiconductor. It has been considered a promising alternative to Bi-Te alloys and other commonly used yet toxic and/or expensive TE materials. To optimize the TE performance of Ag₂Se, recent research has focused on fabricating nanosized Ag₂Se. However, synthesizing Ag₂Se nanoparticles involves energy-intensive and time-consuming techniques with poor yield of final product. In this work, we report a low-cost, solution-processed approach that enables the formation of Ag₂Se thin films from Cu_2-xSe template films via cation exchange at room temperature. Our simple two-step method involves fabricating Cu_2-xSe thin films by the thiolamine dissolution of bulk Cu₂Se, followed by soaking Cu_2-xSe films in AgNO₃ solution and annealing to form Ag₂Se. We report a maximum power factor (PF) of 825 µWm^-1K^-2 for our best-performing Ag₂Se thin-film. This high PF has been achieved via full solution processing without hot-pressing.

Original language	English (US)
Title of host publication	2019 AIChE Annual Meeting
Publisher	American Institute of Chemical Engineers
ISBN (Electronic)	9780816911127
State	Published - 2019
Event	2019 AIChE Annual Meeting - Orlando, United States Duration: Nov 10 2019 → Nov 15 2019

Publication series

Name	AIChE Annual Meeting, Conference Proceedings
Volume	2019-November

Conference

Conference	2019 AIChE Annual Meeting
Country/Territory	United States
City	Orlando
Period	11/10/19 → 11/15/19

All Science Journal Classification (ASJC) codes

General Chemical Engineering
General Chemistry

Cite this

@inproceedings{e78914228e124df5b39dfcf81d2417b5,

title = "High-performance thermoelectric silver selenide thin films cation exchanged from a copper selenide template",

abstract = "Ag2Se has potentially excellent thermoelectric (TE) performance as an n-type semiconductor. It has been considered a promising alternative to Bi-Te alloys and other commonly used yet toxic and/or expensive TE materials. To optimize the TE performance of Ag2Se, recent research has focused on fabricating nanosized Ag2Se. However, synthesizing Ag2Se nanoparticles involves energy-intensive and time-consuming techniques with poor yield of final product. In this work, we report a low-cost, solution-processed approach that enables the formation of Ag2Se thin films from Cu2-xSe template films via cation exchange at room temperature. Our simple two-step method involves fabricating Cu2-xSe thin films by the thiolamine dissolution of bulk Cu2Se, followed by soaking Cu2-xSe films in AgNO3 solution and annealing to form Ag2Se. We report a maximum power factor (PF) of 825 µWm-1K-2 for our best-performing Ag2Se thin-film. This high PF has been achieved via full solution processing without hot-pressing.",

author = "Nan Chen and Scimeca, {Michael R.} and Paul, {Shlok J.} and Hafiz, {Shihab B.} and Ko, {Dong Kyun} and Ayaskanta Sahu",

year = "2019",

language = "English (US)",

series = "AIChE Annual Meeting, Conference Proceedings",

publisher = "American Institute of Chemical Engineers",

booktitle = "2019 AIChE Annual Meeting",

address = "United States",

}

Chen, N, Scimeca, MR, Paul, SJ, Hafiz, SB, Ko, DK & Sahu, A 2019, High-performance thermoelectric silver selenide thin films cation exchanged from a copper selenide template. in 2019 AIChE Annual Meeting. AIChE Annual Meeting, Conference Proceedings, vol. 2019-November, American Institute of Chemical Engineers, 2019 AIChE Annual Meeting, Orlando, United States, 11/10/19.

High-performance thermoelectric silver selenide thin films cation exchanged from a copper selenide template. / Chen, Nan; Scimeca, Michael R.; Paul, Shlok J. et al.
2019 AIChE Annual Meeting. American Institute of Chemical Engineers, 2019. (AIChE Annual Meeting, Conference Proceedings; Vol. 2019-November).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - High-performance thermoelectric silver selenide thin films cation exchanged from a copper selenide template

AU - Chen, Nan

AU - Scimeca, Michael R.

AU - Paul, Shlok J.

AU - Hafiz, Shihab B.

AU - Ko, Dong Kyun

AU - Sahu, Ayaskanta

PY - 2019

Y1 - 2019

N2 - Ag2Se has potentially excellent thermoelectric (TE) performance as an n-type semiconductor. It has been considered a promising alternative to Bi-Te alloys and other commonly used yet toxic and/or expensive TE materials. To optimize the TE performance of Ag2Se, recent research has focused on fabricating nanosized Ag2Se. However, synthesizing Ag2Se nanoparticles involves energy-intensive and time-consuming techniques with poor yield of final product. In this work, we report a low-cost, solution-processed approach that enables the formation of Ag2Se thin films from Cu2-xSe template films via cation exchange at room temperature. Our simple two-step method involves fabricating Cu2-xSe thin films by the thiolamine dissolution of bulk Cu2Se, followed by soaking Cu2-xSe films in AgNO3 solution and annealing to form Ag2Se. We report a maximum power factor (PF) of 825 µWm-1K-2 for our best-performing Ag2Se thin-film. This high PF has been achieved via full solution processing without hot-pressing.

AB - Ag2Se has potentially excellent thermoelectric (TE) performance as an n-type semiconductor. It has been considered a promising alternative to Bi-Te alloys and other commonly used yet toxic and/or expensive TE materials. To optimize the TE performance of Ag2Se, recent research has focused on fabricating nanosized Ag2Se. However, synthesizing Ag2Se nanoparticles involves energy-intensive and time-consuming techniques with poor yield of final product. In this work, we report a low-cost, solution-processed approach that enables the formation of Ag2Se thin films from Cu2-xSe template films via cation exchange at room temperature. Our simple two-step method involves fabricating Cu2-xSe thin films by the thiolamine dissolution of bulk Cu2Se, followed by soaking Cu2-xSe films in AgNO3 solution and annealing to form Ag2Se. We report a maximum power factor (PF) of 825 µWm-1K-2 for our best-performing Ag2Se thin-film. This high PF has been achieved via full solution processing without hot-pressing.

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M3 - Conference contribution

AN - SCOPUS:85095721029

T3 - AIChE Annual Meeting, Conference Proceedings

BT - 2019 AIChE Annual Meeting

PB - American Institute of Chemical Engineers

T2 - 2019 AIChE Annual Meeting

Y2 - 10 November 2019 through 15 November 2019

ER -

High-performance thermoelectric silver selenide thin films cation exchanged from a copper selenide template

Abstract

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Conference

All Science Journal Classification (ASJC) codes

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