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Indexed by:期刊论文

Date of Publication:2018-06-01

Journal:JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS

Included Journals:SCIE、EI

Volume:29

Issue:12

Page Number:10550-10560

ISSN No.:0957-4522

Abstract:Amorphous semiconducting Fe-Si film with direct optical band gap (E (g)) has become a promising candidate material for optoelectronic devices. It can avoid the difficulties of crystalline materials preparation. The key to expanding its applications is to further improve its stability under the premise of maintaining the semiconducting performance. In the present paper, the amorphous Fe-Si-M (M = C, B, Mn, Al, Al + Co) films were prepared on the single-crystal Si(100) and Al2O3(0001) substrates by radio frequency (RF) magnetron sputtering to discuss the effects of the third (fourth) elements M on the films' performance. The result shows that all the added elements except for Al have no obvious effects on the E (g) of the amorphous Fe-Si films. The amorphous Fe-Si-M and Fe-Si films have the same variation trends on the electrical resistivity (rho). However, the conductivity of the films slightly increase after adding the third (fourth) elements. Both the theoretical calculation and experimental results show that the third element C, B and Al can significantly improve the amorphous stability, and the initial crystallization temperatures (T (x)) of the films increase with the third element content. Particularly, the T (x) of amorphous Fe-Si-C films are over 500 A degrees C, the highest T (x) is up to 581 A degrees C, which is similar to 100 A degrees C above that of the a-Fe-Si film with the same Fe content. Therefore, to select the added element M and its content properly can greatly improve the stability of the film without significant effect on the E (g) and rho of the amorphous Fe-Si-M films.