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Monolithic CIGS-Perovskite Tandem Cell for an Optimal Light Harvesting Without Current Matching

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Mantilla-Perez, Paola
Feurer, Thomas
Correa-Baena, Juan-Pablo
Liu, Quan
Colodrero, Silvia
Toudert, Johann
Saliba, Michael
Buecheler, Stephan
Hagfeldt, Anders
Tiwari, Ayodhya N.
Martorell, Jordi
Document typeArticle
Defense date2017-03-23
PublisherACS
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
We present a novel monolithic architecture for optimal light harvesting in multijunction thin film solar cells. In the configuration we consider, formed by a perovskite (PVK) cell overlying a CIGS cell, the current extracted from the two different junctions is decoupled by the insertion of a dielectric nonperiodic photonic multilayer structure. This photonic multilayer is designed by an inverse integration approach to confine the incident sunlight above the PVK band gap in the PVK absorber layer, while increasing the transparency for sunlight below the PVK band gap for an efficient coupling into the CIGS bottom cell. To match the maximum power point voltages in a parallel connection of the PVK and CIGS cells, the latter is divided into two subcells by means of a standard three-laser scribing connection. Using realistic parameters for all the layers in the multijunction architecture we predict power conversion efficiencies of 28%. This represents an improvement of 24% and 26% over the best CIGS and PVK single-junction cells, respectively, while at the same time outperforms the corresponding current-matched standard tandem configuration by more than two percentage points.
CitationMantilla-Perez, P. [et al.]. Monolithic CIGS-Perovskite Tandem Cell for an Optimal Light Harvesting Without Current Matching. "ACS Photonics", 23 Març 2017. 
URIhttp://hdl.handle.net/2117/102822
ISSN2330-4022
Publisher versionhttp://pubs.acs.org/doi/abs/10.1021/acsphotonics.6b00929
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