Achieving an H-induced transparent state in 200nm thick Mg-Ti film by amorphization

被引：5

作者：

Fang, Fang ^{[1
]}

Zhao, Qiyang ^{[1
]}

Wu, Wangyang ^{[1
]}

Qiu, Jiameng ^{[1
]}

Song, Yun ^{[1
]}

Cui, Xiaoli ^{[1
]}

Sun, Dalin ^{[1
]}

Ouyang, Liuzhang ^{[2
]}

Zhu, Min ^{[2
]}

机构：

[1] Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China

[2] S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2014年 / 115卷 / 01期

基金：

中国国家自然科学基金;

关键词：

SWITCHABLE MIRRORS;

D O I：

10.1063/1.4858429

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Crystalline Mg-Ti films with a thickness of more than 50 nm are only switched to a highly absorbing state and cannot be further changed to the transparent state after hydrogen loading at room temperature. To solve this problem, 200 nm thick amorphous MgTix (x = 0.11-0.29) films were prepared and their switchable mirror properties upon hydrogen loading and unloading were investigated. The results show that amorphous MgTix films can be reversibly switched between mirror and transparent states without an absorbing state due to the significant acceleration of hydrogen diffusion by amorphization. Moreover, the switching time of amorphous MgTix films are dramatically shortened with increasing Ti content. Using quartz crystal microbalance method plus transmission spectrum, it is experimentally proved that Ti addition shows little influence on hydrogen diffusion but a strong catalytic effect on MgH2 formation and decomposition. Therefore, the quick formation of a blocking MgH2 layer due to the combined effect of slower hydrogen diffusion in crystalline films and rapid MgH2 formation under Ti catalysis is considered as the reason why the crystalline Mg-Ti films cannot be changed to transparent state after hydrogen loading. (C) 2014 AIP Publishing LLC.

引用

页数：5

共 17 条

[1] Mg-Ti-H thin films as switchable solar absorbers [J].

Baldi, A. ;

Borsa, D. M. ;

Schreuders, H. ;

Rector, J. H. ;

Atmakidis, T. ;

Bakker, M. ;

Zondag, H. A. ;

van Helden, W. G. J. ;

Dam, B. ;

Griessen, R. .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2008, 33 (12) :3188-3192

[2] Magnesium-titanium alloy thin-film switchable mirrors [J].

Bao, S. ;

Tajima, K. ;

Yamada, Y. ;

Okada, M. ;

Yoshimura, K. .

SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2008, 92 (02) :224-227

[3] Color-neutral switchable mirrors based on magnesium-titanium thin films [J].

Bao, S. ;

Tajima, K. ;

Yamada, Y. ;

Okada, M. ;

Yoshimura, K. .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2007, 87 (04) :621-624

[4] Electrohydrogenation of MgH2-thin films [J].

Borgschulte, A. ;

Rector, J. H. ;

Schreuders, H. ;

Dam, B. ;

Griessen, R. .

APPLIED PHYSICS LETTERS, 2007, 90 (07)

[5] Structural, optical, and electrical properties of MgyTi1-yHx thin films [J].

Borsa, D. M. ;

Gremaud, R. ;

Baldi, A. ;

Schreuders, H. ;

Rector, J. H. ;

Kooi, B. ;

Vermeulen, P. ;

Notten, P. H. L. ;

Dam, B. ;

Griessen, R. .

PHYSICAL REVIEW B, 2007, 75 (20)

[6] Mg-Ti-H thin films for smart solar collectors [J].

Borsa, DM ;

Baldi, A ;

Pasturel, M ;

Schreuders, H ;

Dam, B ;

Griessen, R ;

Vermeulen, P ;

Notten, PHL .

APPLIED PHYSICS LETTERS, 2006, 88 (24)

[7] Highly absorbing black Mg and rare-earth-Mg switchable mirrors [J].

Giebels, IAME ;

Isidorsson, J ;

Griessen, R .

PHYSICAL REVIEW B, 2004, 69 (20) :205111-1

[8] Structural and optical properties of MgyNi1-yHx gradient thin films in relation to the as-deposited metallic state [J].

Gremaud, R. ;

van Mechelen, J. L. M. ;

Schreuders, H. ;

Slaman, M. ;

Dam, B. ;

Griessen, R. .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2009, 34 (21) :8951-8957

[9] Self-organized layered hydrogenation in black Mg2NiHx switchable mirrors -: art. no. 197404 [J].

Lohstroh, W ;

Westerwaal, RJ ;

Noheda, B ;

Enache, S ;

Giebels, IAME ;

Dam, B ;

Griessen, R .

PHYSICAL REVIEW LETTERS, 2004, 93 (19) :197404-1

[10] Stabilized switchable "black state" in Mg2NiH4/Ti/Pd thin films for optical hydrogen sensing [J].

Pasturel, M. ;

Slaman, M. ;

Borsa, D. M. ;

Schreuders, H. ;

Dam, B. ;

Griessen, R. ;

Lohstroh, W. ;

Borgschulte, A. .

APPLIED PHYSICS LETTERS, 2006, 89 (02)

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