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ACS Appl Mater Interfaces. 2018 Mar 28;10(12):10296-10303. doi: 10.1021/acsami.7b17204. Epub 2018 Mar 16.

Controllable Carrier Type in Boron Phosphide Nanowires Toward Homostructural Optoelectronic Devices.

Author information

1
State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering , Huazhong University of Science and Technology (HUST) , Wuhan 430074 , P. R. China.

Abstract

The p-n junction is one important and fundamental building block of the optoelectronic age. However, electrons and holes will be severely scattered in heterostructures led by the grain boundary at the alloy interface between two dissimilar semiconductors. In this work, we present boron phosphide (BP) nanowires with artificially controllable carrier type for the fabrication of homojunctions via adjusting borane/phosphine ratio during the deposition process, both prove high crystallization with fewer impurities. The homojunctions that consist of  n-type and p-type BP nanowires show apparent photovoltaic effect [external quantum efficiency ≈ 10% under a ∼0.4 pW light @ 600 nm] and the quenched photoluminescence within the junction area, which indicates the effective separation and transfer of photogenerated charge carriers at the interface. The achievement of controllable carrier type implemented in the same material ushers in a frontier for the design of nanoscale homojunctions toward advanced optoelectronic devices.

KEYWORDS:

boron phosphide; controllable carrier type; homojunction; nanowire; optoelectronic

PMID:
29504739
DOI:
10.1021/acsami.7b17204

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