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Chin. Phys. B, 2022, Vol. 31(10): 107305    DOI: 10.1088/1674-1056/ac67ca

Epitaxial Bi2Sr2CuOy thin films as p-type transparent conductors

Chen Zhou(周臣)1,2, Wang-Ping Cheng(程王平)1,2, Yuan-Di He(何媛娣)1,2, Cheng Shao(邵成)1, Ling Hu(胡令)1, Ren-Huai Wei(魏仁怀)1,†, Jing-Gang Qin(秦经刚)3,‡, Wen-Hai Song(宋文海)1,§, Xue-Bin Zhu(朱雪斌)1, Chuan-Bing Cai(蔡传兵)4, and Yu-Ping Sun(孙玉平)1,5,6
1. Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China;
2. University of Science and Technology of China, Hefei 230026, China;
3. Institute of Plasma Physics, Chinese Academy of Sciences, HFIPS, Chinese Academy of Sciences, Hefei 230031, China;
4. Physics Department, Shanghai Key Laboratory of High Temperature Superconductors, Shanghai University, Shanghai 200444, China;
5. High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China;
6. Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing 210093, China
Abstract  Development of p-type transparent conducting thin films is tireless due to the trade-off issue between optical transparency and conductivity. The rarely concerned low normal state resistance makes Bi-based superconducting cuprates the potential hole-type transparent conductors, which have been realized in Bi2Sr2CaCu2Oy thin films. In this study, epitaxial superconducting Bi2Sr2CuOy and Bi2Sr1.8Nd0.2CuOy thin films with superior normal state conductivity are proposed as p-type transparent conductors. It is found that the Bi2Sr1.8Nd0.2CuOy thin film with thickness 15 nm shows an average visible transmittance of 65% and room-temperature sheet resistance of 650 Ω/sq. The results further demonstrate that Bi-based cuprate superconductors can be regarded as potential p-type transparent conductors for future optoelectronic applications.
Keywords:  p-type      transparent conductor      sol-gel      Bi-2201  
Received:  16 March 2022      Revised:  11 April 2022      Accepted manuscript online: 
PACS:  73.61.-r (Electrical properties of specific thin films)  
  78.20.-e (Optical properties of bulk materials and thin films)  
  81.20.Fw (Sol-gel processing, precipitation)  
  81.15.-z (Methods of deposition of films and coatings; film growth and epitaxy)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11604337).
Corresponding Authors:  Ren-Huai Wei, Jing-Gang Qin, Xue-Bin Zhu     E-mail:;;

Cite this article: 

Chen Zhou(周臣), Wang-Ping Cheng(程王平), Yuan-Di He(何媛娣), Cheng Shao(邵成), Ling Hu(胡令), Ren-Huai Wei(魏仁怀), Jing-Gang Qin(秦经刚), Wen-Hai Song(宋文海), Xue-Bin Zhu(朱雪斌), Chuan-Bing Cai(蔡传兵), and Yu-Ping Sun(孙玉平) Epitaxial Bi2Sr2CuOy thin films as p-type transparent conductors 2022 Chin. Phys. B 31 107305

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