硅酸盐学报

［001］取向铌酸银单晶的电学与光学性能研究

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赵邓小江 ¹ , 赵桂花 ² , 魏世龙 ¹ , 赵桂明 ³ , 金兆鑫 ¹ , 毛著波 ¹ , 胡志昊 ¹

硅酸盐学报 | 研究论文 2025,53(7): 2023-2031

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硅酸盐学报 |研究论文 2025 , 53 (7) : 2023 -2031

［001］取向铌酸银单晶的电学与光学性能研究

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赵邓小江¹, 赵桂花², 魏世龙¹, 赵桂明³, 金兆鑫¹, 毛著波¹, 胡志昊¹

作者信息

^1．兰州石化职业技术大学土木工程学院，兰州 730060

^2．兰州理工大学能源与动力工程学院，兰州 730050

^3．兰州理工大学经济管理学院，兰州 730050

通讯作者:

赵邓小江（1998—），男，硕士，助教；

魏世龙（1985—），男，博士，副教授。

作者简介:

赵邓小江（1998—），男，硕士，助教。

Electrical and Optical Properties of [001]-oriented Silver NiobateSingle Crystal

Dengxiaojiang ZHAO¹, Guihua ZHAO², Shilong WEI¹, Guiming ZHAO³, Zhaoxin JIN¹, Zhubo MAO¹, Zhihao HU¹

Affiliations

^1.School of Civil Engineering, Lanzhou Petrochemical University of Vocational Technology, Lanzhou 730060, China

^2.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China

^3.School of Economics and Management, Lanzhou University of Technology, Lanzhou 730050, China

Corresponding Author:

ZHAO Dengxiaojiang (1998-), male, Master., Teaching Assistant. E-mail: 202419@lzpcc.edu.cn;

WEI Shilong (1985-), male, Ph.D., Associate Professor. peijb@sina.com

ZHAO Dengxiaojiang (1998-), male, Master, Teaching Assistant. E-mail: 202419@lzpcc.edu.cn

出版时间: 2025-07-20 doi: 10.14062/j.issn.0454-5648.20250072

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摘要

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铌酸银（AgNbO_3,AN）作为高性能无铅反铁电材料，在光电器件领域具有巨大潜力。本工作采用AgCl作助溶剂成功生长出高质量AN单晶，并以其［001］取向作为研究对象。结果表明：该取向单晶在200 kV/cm电场下储能密度（W_rec）达1.34 J/cm³，储能效率（η）为30%。尤为突出的是光电性能，该单晶耐受电压高达190 V，同偏压下，漏电流与电压线性对称，且随光功率增加而增大，展现了其在高电压、高功率光电应用的卓越性能，为其在光电器件领域的潜在应用提供参考。

关键词

铌酸银单晶 / 反铁电体 / 光电特性

Abstract

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Introduction

Silver niobate (i.e., AgNbO₃, AN) as a lead-free antiferroelectric material has a promising application in energy storage and photocatalysis. However, a lack of theoretical understanding due to the heterogeneity of ceramic microstructures affects its further development. In this study, high-quality [001]-oriented AN single crystal was grown with AgCl as a co-solvent. This crystal exhibited energy storage density and efficiency comparable to AN ceramic, along with superior photovoltaic performance. The [001]-oriented AN single crystal demonstrated exceptional withstand voltage characteristics, surpassing those of AN ceramic. This work could provide crucial insights into the optoelectronic performance of AN single crystals, paving a way for potential applications in high-energy storage capacitors, piezoelectric devices, and photocatalysis.

Methods

In this study, pure-phase raw materials were synthesized by a solid-state reaction method, followed by the growth of AN single crystals by a modified co-solvent method. The raw materials from Sinopharm Chemical Reagent Co., Ltd., China, were Ag₂O (99.7% purity) and Nb₂O₅ (99.5% purity), which were ground, dried, and then calcined in an oxygen atmosphere at 900℃ for 6 h to obtain pure-phase AN. The raw materials were mixed with a specific amount of AgCl (99.5% purity), and heated in double corundum crucibles in an oxygen atmosphere at 1180 ℃ for melting. The melt was then slowly cooled to 1140 ℃ for nucleation and further cooled to room temperature to obtain single crystals. Finally, the residual AgCl was removed through ammonia treatment.

Results and discussion

The [001]-oriented AgNbO₃ (AN) single crystals exhibit higher phase transition temperatures, compared to conventional AN ceramics, due to their high crystallinity and specific orientation. These crystals also demonstrate exceptional optoelectronic properties, with a forbidden bandwidth of 2.82eV, enabling an effective UV absorption at below 440nm and stable visible light transmittance at above 470 nm. Furthermore, the [001]-oriented AN single crystal shows remarkable withstand voltage characteristics, maintaining a stability at a bias voltage of up to 190 V, significantly exceeding those of AN ceramic (i.e., ~10V). The leakage current increases linearly and symmetrically with voltage and optical power, highlighting their potential for high-voltage, high-power applications. In summary, the [001]-oriented AN single crystal offers unique advantages for photodetectors and optoelectronic devices due to their enhanced phase transition temperatures, superior optoelectronic properties, and exceptional withstand voltage characteristics. A future research can focus on further optimizing their performance and expanding their applications in optoelectronic technology.

Conclusions

In this study, high-quality [001]-oriented AgNbO₃ (AN) single crystals were grown with AgCl as a co-solvent. The crystals exhibited comparable energy density and conversion efficiency to the same-composition ceramics with higher phase transition temperatures due to their crystallinity and orientation. The forbidden bandwidth of 2.82 eV enabled an effective UV light absorption at below 440 nm and a good visible light transmittance at above 470 nm. The crystals demonstrated excellent withstand voltage characteristics, maintaining a stability at high bias voltage and exhibiting a linear relationship between leakage current and voltage/optical power. These results could underscore a potential of [001]-oriented AN single crystal for high-voltage, high-power optoelectronic applications.

Key words

silver niobate single crystal / antifserroelectric / optoelectronic properties

引用本文

赵邓小江, 赵桂花, 魏世龙, 赵桂明, 金兆鑫, 毛著波, 胡志昊. ［001］取向铌酸银单晶的电学与光学性能研究. 硅酸盐学报, 2025 , 53 (7) : 2023 -2031 . DOI: 10.14062/j.issn.0454-5648.20250072

Dengxiaojiang ZHAO, Guihua ZHAO, Shilong WEI, Guiming ZHAO, Zhaoxin JIN, Zhubo MAO, Zhihao HU. Electrical and Optical Properties of [001]-oriented Silver NiobateSingle Crystal[J]. Journal of the Chinese Ceramic Society, 2025 , 53 (7) : 2023 -2031 . DOI: 10.14062/j.issn.0454-5648.20250072

基金

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兰州石化职业技术大学科学研究项目(2024KY-27)
国家自然科学基金项目(51578273; 51268036)

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2025年第53卷第7期

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文章信息

doi: 10.14062/j.issn.0454-5648.20250072

接收时间：2025-01-27
首发时间：2026-10-21
出版时间：2025-07-20

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出版历史

收稿日期：2025-01-27
修回日期：2025-03-02

基金

兰州石化职业技术大学科学研究项目(2024KY-27)

国家自然科学基金项目(51578273; 51268036)

作者信息

^1．兰州石化职业技术大学土木工程学院，兰州 730060

^2．兰州理工大学能源与动力工程学院，兰州 730050

^3．兰州理工大学经济管理学院，兰州 730050

通讯作者:

赵邓小江（1998—），男，硕士，助教；

魏世龙（1985—），男，博士，副教授。

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https://castjournals.cast.org.cn/joweb/gsyxb/CN/10.14062/j.issn.0454-5648.20250072

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2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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