Infrared Cavity-Enhanced Colloidal Quantum Dot Photovoltaics Employing Asymmetric Multilayer ElectrodesClick to copy article linkArticle link copied!
- Se-Woong BaekSe-Woong BaekDepartment of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, CanadaGraduate School of Energy, Environment, Water, and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of KoreaMore by Se-Woong Baek
- Olivier OuelletteOlivier OuelletteDepartment of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, CanadaMore by Olivier Ouellette
- Jea Woong JoJea Woong JoDepartment of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, CanadaMore by Jea Woong Jo
- Jongmin ChoiJongmin ChoiDepartment of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, CanadaMore by Jongmin Choi
- Ki-Won SeoKi-Won SeoGraduate School of Energy, Environment, Water, and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of KoreaMore by Ki-Won Seo
- Junghwan KimJunghwan KimDepartment of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, CanadaMore by Junghwan Kim
- Bin SunBin SunDepartment of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, CanadaMore by Bin Sun
- Sang-Hoon LeeSang-Hoon LeeGraduate School of Energy, Environment, Water, and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of KoreaMore by Sang-Hoon Lee
- Min-Jae ChoiMin-Jae ChoiDepartment of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, CanadaMore by Min-Jae Choi
- Dae-Hyun NamDae-Hyun NamDepartment of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, CanadaMore by Dae-Hyun Nam
- Li Na QuanLi Na QuanDepartment of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, CanadaMore by Li Na Quan
- Juhoon KangJuhoon KangGraduate School of Energy, Environment, Water, and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of KoreaMore by Juhoon Kang
- Sjoerd HooglandSjoerd HooglandDepartment of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, CanadaMore by Sjoerd Hoogland
- F. Pelayo García de ArquerF. Pelayo García de ArquerDepartment of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, CanadaMore by F. Pelayo García de Arquer
- Jung-Yong Lee*Jung-Yong Lee*E-mail: [email protected] (J.-Y.L.).Graduate School of Energy, Environment, Water, and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of KoreaMore by Jung-Yong Lee
- Edward. H Sargent*Edward. H Sargent*E-mail: [email protected] (E.H.S.)Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, CanadaMore by Edward. H Sargent
Abstract

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.
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