Aligned CuO nanowire array for a high performance visible light photodetector

Jo, Min-SeungKorea Adv Inst Sci & Technol KAIST, Sch Elect Engn, 291 Daehak Ro, Taejon 34141, South Korea. (författare)

QC 20220315
Recently, copper oxide (CuO) has drawn much attention as a promising material in visible light photodetection with its advantages in ease of nanofabrication. CuO allows a variety of nanostructures to be explored to enhance the optoelectrical performance such as photogenerated carriers scattering and bandgap engineering. However, previous researches neglect in-depth analysis of CuO's light interaction effects, restrictively using random orientation such as randomly arranged nanowires, single nanowires, and dispersed nanoparticles. Here, we demonstrate an ultra-high performance CuO visible light photodetector utilizing perfectly-aligned nanowire array structures. CuO nanowires with 300 nm-width critical dimension suppressed carrier transport in the dark state and enhanced the conversion of photons to carriers; additionally, the aligned arrangement of the nanowires with designed geometry improved the light absorption by means of the constructive interference effect. The proposed nanostructures provide advantages in terms of dark current, photocurrent, and response time, showing unprecedentedly high (state-of-the-art) optoelectronic performance, including high values of sensitivity (S = 172.21%), photo-responsivity (R = 16.03 A/W, lambda = 535 nm), photo-detectivity (D* = 7.78 x 10(11) Jones), rise/decay time (tau(r)/tau(d) = 0.31 s/1.21 s).

Song, Hyeon-JooSAMSUNG ELECT Co Ltd, 1 Samsungjeonja Ro, Hwaseong Si 18448, Gyeonggi Do, South Korea. (författare)
Kim, Beom-JunKorea Adv Inst Sci & Technol KAIST, Sch Elect Engn, 291 Daehak Ro, Taejon 34141, South Korea. (författare)
Shin, Yoo-KyumPusan Natl Univ, Coll Informat & Biomed Engn, Dept Informat Convergence Engn, Yangsan 50612, South Korea. (författare)
Kim, Sung-HoKorea Adv Inst Sci & Technol KAIST, Sch Elect Engn, 291 Daehak Ro, Taejon 34141, South Korea. (författare)
Tian, XuKTH,Mikro- och nanosystemteknik(Swepub:kth)u1681ske (författare)
Kim, Sang-MinPusan Natl Univ, Coll Informat & Biomed Engn, Dept Informat Convergence Engn, Yangsan 50612, South Korea. (författare)
Seo, Min-HoPusan Natl Univ, Coll Informat & Biomed Engn, Dept Informat Convergence Engn, Yangsan 50612, South Korea.;Pusan Natl Univ, Coll Informat & Biomed Engn, Sch Biomed Convergence Engn, Yangsan 50612, South Korea. (författare)
Yoon, Jun-BoKorea Adv Inst Sci & Technol KAIST, Sch Elect Engn, 291 Daehak Ro, Taejon 34141, South Korea. (författare)
Korea Adv Inst Sci & Technol KAIST, Sch Elect Engn, 291 Daehak Ro, Taejon 34141, South Korea.SAMSUNG ELECT Co Ltd, 1 Samsungjeonja Ro, Hwaseong Si 18448, Gyeonggi Do, South Korea. (creator_code:org_t)

Av författaren/redakt...: Jo, Min-Seung; Song, Hyeon-Joo; Kim, Beom-Jun; Shin, Yoo-Kyum; Kim, Sung-Ho; Tian, Xu; visa fler...; Kim, Sang-Min; Seo, Min-Ho; Yoon, Jun-Bo; visa färre...

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