Bypassing the Single Junction Limit with Advanced Photovoltaic Architectures

Author:

Lüer Larry1ORCID,Peters Ian Marius2,Corre Vincent M. Le1,Forberich Karen2,Guldi Dirk M.3,Brabec Christoph J.12ORCID

Affiliation:

1. Institute of Materials for Electronics and Energy Technology (i‐MEET) Friedrich‐Alexander‐Universität Erlangen‐Nürnberg Martensstrasse 7 91058 Erlangen Germany

2. High Throughput Methods in Photovoltaics Forschungszentrum Jülich GmbH Helmholtz Institute Erlangen‐Nürnberg for Renewable Energy (HI ERN) Immerwahrstraße 2 91058 Erlangen Germany

3. Department of Chemistry and Pharmacy Friedrich‐Alexander‐Universität Erlangen‐Nürnberg Egerlandstr. 3 91058 Erlangen Germany

Abstract

AbstractMultijunction devices and photon up‐ and down‐conversion are prominent concepts aimed at increasing photovoltaic efficiencies beyond the single junction limit. Integrating these concepts into advanced architectures may address long‐standing issues such as processing complexity, microstructure control, and resilience against spectral changes of the incoming radiation. However, so far, no models have been established to predict the performance of such integrated architectures. Here, a simulation environment based on Bayesian optimization is presented, that can predict and virtually optimize the electrical performance of multi‐junction architectures, both vertical and lateral, in combination with up‐ and down‐conversion materials. Microstructure effects on performance are explicitly considered using machine‐learned predictive models from high throughput experimentation on simpler architectures. Two architectures that would surpass the single junction limit of photovoltaic energy conversion at reasonable complexity are identified: a vertical “staggered half octave system,” where selective absorption allows the use of 6 different bandgaps, and the lateral “overlapping rainbow system” where selective irradiation allows the use of a narrowband energy acceptor with reduced voltage losses, according to the energy gap law. Both architectures would be highly resilient against spectral changes, in contrast with two terminal multi‐junction architectures which are limited by Kirchhoff's law.

Funder

Deutsche Forschungsgemeinschaft

Solar Technologies go Hybrid

Medizinische Fakultät, Friedrich-Alexander-Universität Erlangen-Nürnberg

Helmholtz Association

Publisher

Wiley

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

Reference34 articles.

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5. Q.Huang Q.Peng J.Hu H.Xu C.Jiang Q.Liu 2016 IEEE Advanced Information Management Communicates Electronic and Automation Control Conf. (IMCEC) IEEE Piscataway NJ2016 pp.1528–1532.

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