High Carrier Densities Achieved at Low Voltages in Ambipolar PbSe Nanocrystal Thin-Film Transistors

被引:112
作者
Kang, Moon Sung [1 ]
Lee, Jiyoul [1 ]
Norris, David J. [1 ]
Frisbie, C. Daniel [1 ]
机构
[1] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA
基金
美国国家科学基金会;
关键词
FIELD-EFFECT TRANSISTORS; SEMICONDUCTOR NANOCRYSTALS; ELECTRICAL-PROPERTIES; SOLIDS; POLYMER; ELECTROLUMINESCENCE; TRANSPORT;
D O I
10.1021/nl902062x
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Efficient transport of both electrons and holes with high carrier densities is a requirement for obtaining light-emitting transistors from films of colloidal semiconductor nanocrystals. Such devices offer an approach to efficient electrically pumped nanocrystal lasers with tunable emission. Here, we report a low-voltage ambipolar thin-film transistor that features high carrier mobility and high induced carrier density by combining a PbSe nanocrystal film with a high-capacitance ion-gel gate dielectric layer (similar to 22 and similar to 9 mu F/cm(2) for electron and hole accumulation, respectively). At operation voltages below 2.5 V, electron and hole densities higher than similar to 10(14) carriers/cm(2) could be achieved in the PbSe nanocrystal film, which corresponds to similar to 3 electrons or holes per particle. Carrier mobilities were also dependent on charge density and were as high as 0.4 and 0.02 cm(2)/(V s) for electrons and holes, respectively.
引用
收藏
页码:3848 / 3852
页数:5
相关论文
共 34 条
[1]   Perspectives on the physical chemistry of semiconductor nanocrystals [J].
Alivisatos, AP .
JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (31) :13226-13239
[2]   Confinement effects in PbSe quantum wells and nanocrystals [J].
Allan, G ;
Delerue, C .
PHYSICAL REVIEW B, 2004, 70 (24) :1-9
[3]   Prospects for electrically pumped organic lasers [J].
Baldo, MA ;
Holmes, RJ ;
Forrest, SR .
PHYSICAL REVIEW B, 2002, 66 (03) :353211-3532116
[4]  
Bard A.J., 1980, ELECTROCHEMICAL METH
[5]   Printable ion-gel gate dielectrics for low-voltage polymer thin-film transistors on plastic [J].
Cho, Jeong Ho ;
Lee, Jiyoul ;
Xia, Yu ;
Kim, Bongsoo ;
He, Yiyong ;
Renn, Michael J. ;
Lodge, Timothy P. ;
Frisbie, C. Daniel .
NATURE MATERIALS, 2008, 7 (11) :900-906
[6]   Electroluminescence from single monolayers of nanocrystals in molecular organic devices [J].
Coe, S ;
Woo, WK ;
Bawendi, M ;
Bulovic, V .
NATURE, 2002, 420 (6917) :800-803
[7]  
COLVIN VL, 1994, NATURE, V370, P354, DOI 10.1038/370354a0
[8]   Transport properties of annealed CdSe colloidal nanocrystal solids [J].
Drndic, M ;
Jarosz, MV ;
Morgan, NY ;
Kastner, MA ;
Bawendi, MG .
JOURNAL OF APPLIED PHYSICS, 2002, 92 (12) :7498-7503
[9]   Integration of a Rib Waveguide Distributed Feedback Structure into a Light-Emitting Polymer Field-Effect Transistor [J].
Gwinner, Michael C. ;
Khodabakhsh, Saghar ;
Song, Myoung Hoon ;
Schweizer, Heinz ;
Giessen, Harold ;
Sirringhaus, Henning .
ADVANCED FUNCTIONAL MATERIALS, 2009, 19 (09) :1360-1370
[10]   Ion gels by self-assembly of a triblock copolymer in an ionic liquid [J].
He, Yiyong ;
Boswell, Paul G. ;
Buhlmann, Philippe ;
Lodge, Timothy P. .
JOURNAL OF PHYSICAL CHEMISTRY B, 2007, 111 (18) :4645-4652