標題: Versatile plasmonic-effects at the interface of inverted perovskite solar cells
作者: Shalan, Ahmed Esmail
Oshikiri, Tomoya
Sawayanagi, Hiroki
Nakamura, Keisuke
Ueno, Kosei
Sun, Quan
Wu, Hui-Ping
Diau, Eric Wei-Guang
Misawa, Hiroaki
應用化學系
應用化學系分子科學碩博班
Department of Applied Chemistry
Institute of Molecular science
公開日期: 2017
摘要: Plasmonics is a highly promising approach to enhancing the light-harvesting properties of hybrid organic/ inorganic perovskite solar cells. In the present work, our cells have a p-i-n inverted planar structure. An ultrathin NiO film with two different thicknesses of 5 and 10 nm prepared by a pulsed laser deposition process on an ITO substrate with a faceted and furrowed surface enabled the formation of a continuous and compact layer of well-crystallized CH3NH3PbI3 via an anti-solvent chlorobenzene process. The coverage mechanism of the NiO film on the ITO was clearly demonstrated through the J-V and external quantum efficiency (EQE) curves. Moreover, the results demonstrated that the gold nanoislands (Au NIs) increased the power conversion efficiency to 5.1%, almost double that of the samples without Au NIs. This result is due to the excitation of surface plasmons, which is characterized by strong scattering and enhancement of the electric field in the vicinity of the Au NIs loaded at the interface between the NiO and perovskite films. Additionally, we observed an enhancement of the EQE at wavelengths shorter than the plasmon resonance peak. In the current state, we speculate that the plasmoelectric potential effect is considered to be a good explanation of the photocurrent enhancement at the off-resonance region. Our work provides good guidance for the design and fabrication of solar-energy-related devices employing NiO electrodes and plasmonic Au NIs.
URI: http://dx.doi.org/10.1039/c6nr06741g
http://hdl.handle.net/11536/133319
ISSN: 2040-3364
DOI: 10.1039/c6nr06741g
期刊: NANOSCALE
Volume: 9
Issue: 3
起始頁: 1229
結束頁: 1236
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