Optoelectronic properties of methyl-terminated germanane

被引：20

作者：

Livache, Clement ^{[1
,2
]}

Ryan, Bradley J. ^{[3
]}

Ramesh, Utkarsh ^{[3
]}

Steinmetz, Violette ^{[1
]}

Greboval, Charlie ^{[1
]}

Chu, Audrey ^{[1
]}

Brule, Thibault ^{[4
]}

Ithurria, Sandrine ^{[2
]}

Prevot, Geoffroy ^{[1
]}

Barisien, Thierry ^{[1
]}

Ouerghi, Abdelkarim ^{[5
]}

Panthani, Matthew G. ^{[3
]}

Lhuillier, Emmanuel ^{[1
]}

机构：

[1] Sorbonne Univ, Inst NanoSci Paris, CNRS, 4 Pl Jussieu, F-75005 Paris, France

[2] Univ Paris 06, Lab Phys & Etud Mat, ESPCI Paris, PSL Res Univ,Sorbonne Univ,CNRS,UMR 8213, 10 Rue Vauquelin, F-75005 Paris, France

[3] Iowa State Univ, Dept Chem & Biol Engn, Ames, IA 50011 USA

[4] HOR & BA France SAS, HORIBA Sci, Ave Vauve, F-91120 Palaiseau, France

[5] Univ Paris Saclay, Ctr Nanosci & Nanotechnol, Univ Paris Sud, C2N,CNRS, F-91460 Palaiseau, France

来源：

APPLIED PHYSICS LETTERS | 2019年 / 115卷 / 05期

基金：

美国国家科学基金会; 欧洲研究理事会;

关键词：

OPTICAL-PROPERTIES; HIGH-YIELD; NANOCRYSTALS; PHOTODETECTORS; NANOPLATELETS; BANDGAP;

D O I：

10.1063/1.5111011

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Germanane is a two-dimensional, strongly confined form of germanium. It presents an interesting combination of (i) ease of integration with CMOS technology, (ii) low toxicity, and (iii) electronic confinement which transforms the indirect bandgap of the bulk material into a direct bandgap featuring photoluminescence. However, the optoelectronic properties of this material remain far less investigated than its structural properties. Here, we investigate the photoluminescence and transport properties of arrays of methyl-terminated germanane flakes. The photoluminescence appears to have two contributions, one from the band edge and the other from trap states. The dynamics of the exciton appear to be in the range of 1-100ns. Conduction in this material appears to be p-type, while the photoconduction time response can be made as short as 100 mu s.

引用

页数：4

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