journal article·2019-10-23

Electrical-Field-Driven Tunable Spectral Responses in a Broadband-Absorbing Perovskite Photodiode

Xiaofeng Tang, Gebhard J. Matt, Shuai Gao, Ening Gu, Osbel Almora, Christoph J. Brabec

ACS Applied Materials & Interfaces· Volume 11· Issue 42
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Abstract

Controllably manipulating the spectral response of broadband-absorbing semiconductors is crucial for developing wavelength-selective optoelectronic devices. In this article, we report for the first time, the bias-dependent spectral responses for a metal-halide perovskite photodiode. Tunable external quantum efficiencies in the short- and long-wavelength regimes, and the full spectral range (ca. 300-800 nm) are observed when the device is operated under short-circuit, and forward and reverse bias conditions, respectively. This observation is understood by the interplay of wavelength-dependent penetration depth and barrier formation within the photodiode device stack. The general applicability of this concept is confirmed by a systematic study on a series of mixed-halide perovskite devices. These results suggest that the proposed concept allows as a promising platform and should inspire further exploration of multispectral responsive optoelectronic devices.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Solid-state spectroscopy and crystallography · Transition Metal Oxide Nanomaterials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Materials for Electronics and Energy Technology (i-MEET), Department of Materials Science and Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Martensstr. 7, 91058 Erlangen, Germany

Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-Universität Erlangen-Nürnberg, Paul-Gordan-Str. 6, 91052 Erlangen, Germany

Bavarian Center for Applied Energy Research (ZAE Bayern), Immerwahrstr. 2, 91058 Erlangen, Germany

Funding

Universit?tsbund Erlangen-N?rnberg · Deutsche Forschungsgemeinschaft · China Scholarship Council · Solar Technologies go Hybrid · Energy Campus Nuremberg Initiative · VDI/VDE Innovation + Technik GmbH · Cluster of Excellence ?Engineering of Advanced Materials? · ?Aufbruch Bayern? initiative Soltech · Helmholtz-Institute Erlangen-N?rnberg

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