La, Ju A. Kang, JoonHyun Byun, Ji Young Kim, In Soo Kang, Gumin Ko, Hyungduk 2024-01-19T15:32:07Z 2024-01-19T15:32:07Z 2021-09-02 2021-02 0169-4332 https://pubs.kist.re.kr/handle/201004/117464 We present a perovskite photodetector functionalized with Au NPs assembled with 3-mercaptopropionic acid (MPA), a short-chain alkanethiol (HS(CH2)(n)COOH, n = 2), where the assembled Au NPs are embedded in the PEDOT:PSS layer of the hole transport layer. The incorporation of the Au NPs-MPA assembly not only enhances the responsivity strongly, but also improves the detectivity due to a reduction in dark current and enhances the response speed of the device. In particular, the responsivity, noise equivalent power (NEP), and response speed of the Au NPs-MPA assembly device significantly improved by approximately 4.1, 15.6, and 2.8 folds, respectively, as compared with those of the pristine device under visible light illumination. Our device exhibits a responsivity of similar to 2063 A W-1 and a NEP of similar to 1.93 x 10(-14) W Hz(-1/2) due to the incorporation of the Au NPsMPA assembly, and a response time of similar to 300 ns is achieved by the fabrication of a short channel in the device. The improved charge extraction/transport and optical absorption by the introduction of Au NPs-MPA assembly lead to the overall improved device performance. English Elsevier BV Highly sensitive and fast perovskite photodetector functionalized by plasmonic Au nanoparticles-alkanethiol assembly Article 10.1016/j.apsusc.2020.148007 1 Applied Surface Science, v.538 Applied Surface Science 538 N scie scopus 000595140800004 2-s2.0-85092131670 Chemistry, Physical Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter Chemistry Materials Science Physics Article HOLE-TRANSPORT-LAYER SOLAR-CELLS POLYMER PERFORMANCE SURFACE NOISE LIGHT NPS Au NPs-MPA assembly Plasmon Perovskite photodetector Fast response