Infrared Cavity-Enhanced Colloidal Quantum Dot Photovoltaics Employing Asymmetric Multilayer Electrodes
| Autor: | Jongmin Choi, F. Pelayo García de Arquer, Jung-Yong Lee, Se-Woong Baek, Min-Jae Choi, Olivier Ouellette, Ki-Won Seo, Dae-Hyun Nam, Bin Sun, Edward H. Sargent, Junghwan Kim, Li Na Quan, Sjoerd Hoogland, Sang Hoon Lee, Jea Woong Jo, Juhoon Kang |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Silicon Infrared Oxide Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 7. Clean energy 01 natural sciences chemistry.chemical_compound Photovoltaics Materials Chemistry Transmittance Sheet resistance Renewable Energy Sustainability and the Environment business.industry 021001 nanoscience & nanotechnology 0104 chemical sciences Fuel Technology chemistry Chemistry (miscellaneous) Quantum dot Optoelectronics 0210 nano-technology business Refractive index |
| Zdroj: | ACS Energy Letters. 3:2908-2913 |
| ISSN: | 2380-8195 |
| Popis: | Efficient infrared (IR) optoelectronic devices, crucial for emerging sensing applications and also for solar energy harvesting, demand high-conductivity IR-transparent electrodes. Here we present a new strategy, one based on oxide/metal/oxide multilayers, that enables highly transparent IR electrodes. Symmetry breaking in the oxide stack leads to broad and high transmittance from visible to IR wavelengths, while a low refractive index doped oxide as a front layer boosts IR transmittance. The combination of doped oxide and ultrathin metal film allows for low sheet resistance while maintaining IR transparency. We engineer the IR microcavity effect using the asymmetric multilayer approach to tailor the distribution of incident radiation to maximize IR absorption in the colloidal quantum dot (CQD) layer. As a result, the absorption-enhanced IR CQD solar cells exhibit a photoelectric conversion efficiency of 70% at a wavelength of 1.25 μm, i.e., well within the spectral range in which silicon is blind. |
| Databáze: | OpenAIRE |
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