A heterostructure p-n junction constituting of fluorite and perovskite semiconductors for electrochemical energy conversion

Jiamei Liu; Decai Zhu; Chengjun Zhu; Yifu Jing; Xin Jia; Yingbo Zhang; Min Yang; Jie Yu; Liangdong Fan; Muhammad Imran Asghar; Peter D. Lund

doi:10.1016/j.enconman.2022.116107

A heterostructure p-n junction constituting of fluorite and perovskite semiconductors for electrochemical energy conversion

Jiamei Liu, Decai Zhu, Chengjun Zhu^*, Yifu Jing, Xin Jia, Yingbo Zhang, Min Yang, Jie Yu, Liangdong Fan, Muhammad Imran Asghar, Peter D. Lund

^*Corresponding author for this work

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

28 Citations (Scopus)

Abstract

A semiconductor heterostructure material based on p-type cubic perovskite Ba_0.9K_0.1Fe_0.5Co_0.5O_3-δ (BKFC) and n-type fluorite Sm_0.075Nd_0.075Ce_0.85O_2-δ (SNDC) forms micro p-n junctions in the low-temperature solid oxide fuel cells (LT-SOFCs) improving the electrochemical performance. A highly power density of 911 mW·cm⁻² at 550° C was obtained with this material combination as electrolyte in a fuel cell, which is 20 % higher than that of the LT-SOFCs with pure BKFC as electrolyte. An ionic conductivity of 0.14 S·cm⁻¹ at 550° C was achieved when equal amounts of BKFC and SNDC were employed as the electrolyte. Profound analysis of the heterostructure p-n junction shows that it blocks electron transport through mixed electronic and ionic conductor and enhances ionic transport improving the electrochemical performance of the fuel cell. The BKFC-SNDC composite electrolyte materials is a potential electrolyte material for raising the power density of fuel cells at lower temperatures.

Original language	English
Article number	116107
Pages (from-to)	1-10
Number of pages	10
Journal	Energy Conversion and Management
Volume	269
DOIs	https://doi.org/10.1016/j.enconman.2022.116107
Publication status	Published - 1 Oct 2022
MoE publication type	A1 Journal article-refereed

Keywords

Fluorite structure
LT-SOFC
P-n junction, Heterostructure
Perovskite structure

UN SDGs

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

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10.1016/j.enconman.2022.116107

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title = "A heterostructure p-n junction constituting of fluorite and perovskite semiconductors for electrochemical energy conversion",

abstract = "A semiconductor heterostructure material based on p-type cubic perovskite Ba0.9K0.1Fe0.5Co0.5O3-δ (BKFC) and n-type fluorite Sm0.075Nd0.075Ce0.85O2-δ (SNDC) forms micro p-n junctions in the low-temperature solid oxide fuel cells (LT-SOFCs) improving the electrochemical performance. A highly power density of 911 mW·cm−2 at 550° C was obtained with this material combination as electrolyte in a fuel cell, which is 20 % higher than that of the LT-SOFCs with pure BKFC as electrolyte. An ionic conductivity of 0.14 S·cm−1 at 550° C was achieved when equal amounts of BKFC and SNDC were employed as the electrolyte. Profound analysis of the heterostructure p-n junction shows that it blocks electron transport through mixed electronic and ionic conductor and enhances ionic transport improving the electrochemical performance of the fuel cell. The BKFC-SNDC composite electrolyte materials is a potential electrolyte material for raising the power density of fuel cells at lower temperatures.",

keywords = "Fluorite structure, LT-SOFC, P-n junction, Heterostructure, Perovskite structure",

author = "Jiamei Liu and Decai Zhu and Chengjun Zhu and Yifu Jing and Xin Jia and Yingbo Zhang and Min Yang and Jie Yu and Liangdong Fan and {Imran Asghar}, Muhammad and Lund, {Peter D.}",

note = "Funding Information: The authors gratefully acknowledge the supports from the National Natural Science Foundation of China (Nos. 62064010 and 51262020 ) and the Natural Science Foundation of Inner Mongolia Autonomous Region (2020MS05004). Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

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doi = "10.1016/j.enconman.2022.116107",

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TY - JOUR

T1 - A heterostructure p-n junction constituting of fluorite and perovskite semiconductors for electrochemical energy conversion

AU - Liu, Jiamei

AU - Zhu, Decai

AU - Zhu, Chengjun

AU - Jing, Yifu

AU - Jia, Xin

AU - Zhang, Yingbo

AU - Yang, Min

AU - Yu, Jie

AU - Fan, Liangdong

AU - Imran Asghar, Muhammad

AU - Lund, Peter D.

N1 - Funding Information: The authors gratefully acknowledge the supports from the National Natural Science Foundation of China (Nos. 62064010 and 51262020 ) and the Natural Science Foundation of Inner Mongolia Autonomous Region (2020MS05004). Publisher Copyright: © 2022 Elsevier Ltd

PY - 2022/10/1

Y1 - 2022/10/1

N2 - A semiconductor heterostructure material based on p-type cubic perovskite Ba0.9K0.1Fe0.5Co0.5O3-δ (BKFC) and n-type fluorite Sm0.075Nd0.075Ce0.85O2-δ (SNDC) forms micro p-n junctions in the low-temperature solid oxide fuel cells (LT-SOFCs) improving the electrochemical performance. A highly power density of 911 mW·cm−2 at 550° C was obtained with this material combination as electrolyte in a fuel cell, which is 20 % higher than that of the LT-SOFCs with pure BKFC as electrolyte. An ionic conductivity of 0.14 S·cm−1 at 550° C was achieved when equal amounts of BKFC and SNDC were employed as the electrolyte. Profound analysis of the heterostructure p-n junction shows that it blocks electron transport through mixed electronic and ionic conductor and enhances ionic transport improving the electrochemical performance of the fuel cell. The BKFC-SNDC composite electrolyte materials is a potential electrolyte material for raising the power density of fuel cells at lower temperatures.

AB - A semiconductor heterostructure material based on p-type cubic perovskite Ba0.9K0.1Fe0.5Co0.5O3-δ (BKFC) and n-type fluorite Sm0.075Nd0.075Ce0.85O2-δ (SNDC) forms micro p-n junctions in the low-temperature solid oxide fuel cells (LT-SOFCs) improving the electrochemical performance. A highly power density of 911 mW·cm−2 at 550° C was obtained with this material combination as electrolyte in a fuel cell, which is 20 % higher than that of the LT-SOFCs with pure BKFC as electrolyte. An ionic conductivity of 0.14 S·cm−1 at 550° C was achieved when equal amounts of BKFC and SNDC were employed as the electrolyte. Profound analysis of the heterostructure p-n junction shows that it blocks electron transport through mixed electronic and ionic conductor and enhances ionic transport improving the electrochemical performance of the fuel cell. The BKFC-SNDC composite electrolyte materials is a potential electrolyte material for raising the power density of fuel cells at lower temperatures.

KW - Fluorite structure

KW - LT-SOFC

KW - P-n junction, Heterostructure

KW - Perovskite structure

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U2 - 10.1016/j.enconman.2022.116107

DO - 10.1016/j.enconman.2022.116107

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SN - 0196-8904

VL - 269

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JO - Energy Conversion and Management

JF - Energy Conversion and Management

M1 - 116107

ER -

A heterostructure p-n junction constituting of fluorite and perovskite semiconductors for electrochemical energy conversion

Abstract

Keywords

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