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Advanced Lithography for Integrated Systems Lab. (ALIS)

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A paper accepted in Nanoscale

작성자Admin  조회수681 Date2019-10-29
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As an alternative of silicon-baesd solar cells, organic-inorganic hybrid perovskite solar cells (PSCs) have attracted much attention and achieved a comparable power conversion efficiency (PCE) to the silicon-based ones, although the perovskite materials can absorb only visible light. Hence, a remaining challenge to enhence the PCE is to utilize near infrared (NIR) light in solar light spectrum. One of the easiest ways to utilize the NIR is to incorporate NIR active materials to the PSCs such as up-conversion nanoparticles (UCNPs); however, such stratergy is not simple to adopt into the PSCs due to the inherent vurnerability of perovskite materials towards moisture. In this work, we present NIR-utilizing PSCs by locating UCNPs within the PSC structure by a simple dry transfer method. Maximum PCE of 15.56 % was obtained in the case of PSC having the UCNPs located between hole transport layer (HTL) and gold (Au) top electrode, which is 8.4 % enhancement compared to the reference without those. This enhancement came from the combined effects of NIR light utilization and the surface plasmon resonance (SPR) phenomenon originating from the Au top electrode, which was interfacing the UCNPs.

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