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Issue 9, 2018
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Perovskite templating via a bathophenanthroline additive for efficient light-emitting devices

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Abstract

Identified as emerging light absorbers due to their plethora of unique optoelectronic properties, perovskites have also been touted as a promising candidate for light emission. However, despite the effortless transition of perovskites into the current organic light-emitting diodes (OLEDs), misalignment of energy levels at the hole transporting material (HTM) and perovskite interface limits the efficacy of interfacial charge transport. Herein, it is shown that by incorporating a small organic molecule, bathophenanthroline (BPhen), into the CH3NH3PbBr3 emitter via a solvent engineering technique, the energy band levels of the perovskite can be tailored and the energy mismatch at the HTM/perovskite interface can be ameliorated through the formation of a graded emitter layer and accompanying morphological improvements. With a BPhen concentration of 0.500 mg mL−1, more than ten-fold enhancement of device luminance and efficiency was achieved, thus demonstrating a facile and viable approach for fabricating high-performance perovskite light-emitting diodes (PeLEDs).

Graphical abstract: Perovskite templating via a bathophenanthroline additive for efficient light-emitting devices

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Publication details

The article was received on 09 Dec 2017, accepted on 01 Feb 2018 and first published on 01 Feb 2018


Article type: Paper
DOI: 10.1039/C7TC05643E
Citation: J. Mater. Chem. C, 2018,6, 2295-2302
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    Perovskite templating via a bathophenanthroline additive for efficient light-emitting devices

    N. F. Jamaludin, N. Yantara, Y. F. Ng, A. Bruno, B. K. Chandran, X. Y. Chin, K. Thirumal, N. Mathews, C. Soci and S. Mhaisalkar, J. Mater. Chem. C, 2018, 6, 2295
    DOI: 10.1039/C7TC05643E

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