Photoconductivity of CdTe Nanocrystal-Based Thin Films: Te2- Ligands Lead To Charge Carrier Diffusion Lengths Over 2 μm

被引：21
作者：
Crisp, Ryan W. [1 ,2 ]
Callahan, Rebecca [1 ,3 ]
Reid, Obadiah G. [4 ]
Dolzhnikov, Dmitriy S. [5 ]
Talapin, Dmitri V.
Rumbles, Garry [1 ]
Luther, Joseph M. [1 ]
Kopidakis, Nikos [1 ]
机构：
[1] Natl Renewable Energy Lab, Golden, CO 80401 USA
[2] Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA
[3] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA
[4] Univ Colorado, Renewable & Sustainable Energy Inst, Boulder, CO 80309 USA
[5] Univ Chicago, Dept Chem, Chicago, IL 60637 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2015年 / 6卷 / 23期
关键词：
QUANTUM-DOT SOLIDS; SOLAR-CELLS; COLLOIDAL NANOCRYSTALS; ELECTRICAL-PROPERTIES; SURFACE LIGANDS; CDSE; TRANSPORT; LAYER; PHOTOVOLTAICS; PERFORMANCE;
D O I：
10.1021/acs.jpclett.5b02252
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We report on photoconductivity of films of CdTe nanocrystals (NCs) using time-resolved microwave photoconductivity (TRMC). Spherical and tetrapodal CdTe NCs with tunable size-dependent properties are studied as a function of surface ligand (including inorganic molecular chalcogenide species) and annealing temperature. Relatively high carrier mobility is measured for films of sintered tetrapod NCs (4 cm(2)/(V s)). Our TRMC findings show that Te2- capped CdTe NCs show a marked improvement in carrier mobility (11 cm(2)/(V s)), indicating that NC surface termination can be altered to play a crucial role in charge-carrier mobility even after the NC solids are sintered into bulk films.
引用
收藏
页码：4815 / 4821
页数：7
相关论文
共 39 条
  • [11] Signature of exciton annihilation in the photoconductance of regioregular poly(3-hexylthiophene)
    Dicker, G
    de Haas, MP
    Siebbeles, LDA
    [J]. PHYSICAL REVIEW B, 2005, 71 (15):
  • [12] Composition-matched molecular "solders" for semiconductors
    Dolzhnikov, Dmitriy S.
    Zhang, Hao
    Jang, Jaeyoung
    Son, Jae Sung
    Panthani, Matthew G.
    Shibata, Tomohiro
    Chattopadhyay, Soma
    Talapin, Dmitri V.
    [J]. SCIENCE, 2015, 347 (6220) : 425 - 428
  • [13] Dark Carriers, Trapping, and Activation Control of Carrier Recombination in Neat P3HT and P3HT:PCBM Blends
    Ferguson, Andrew J.
    Kopidakis, Nikos
    Shaheen, Sean E.
    Rumbles, Garry
    [J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2011, 115 (46) : 23134 - 23148
  • [14] What Limits Photoconductance in Anatase TiO2 Nanostructures? A Real and Imaginary Microwave Conductance Study
    Fravventura, Maria C.
    Deligiannis, Dimitrios
    Schins, Juleon M.
    Siebbeles, Laurens D. A.
    Savenije, Tom J.
    [J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2013, 117 (16) : 8032 - 8040
  • [15] Photoconductivity of PbSe Quantum-Dot Solids: Dependence on Ligand Anchor Group and Length
    Gao, Yunan
    Aerts, Michiel
    Sandeep, C. S. Suchand
    Talgorn, Elise
    Savenije, Tom J.
    Kinge, Sachin
    Siebbeles, Laurens D. A.
    Houtepen, Arjan J.
    [J]. ACS NANO, 2012, 6 (11) : 9606 - 9614
  • [16] Charge injection and transport in films of CdSe nanocrystals
    Ginger, DS
    Greenham, NC
    [J]. JOURNAL OF APPLIED PHYSICS, 2000, 87 (03) : 1361 - 1368
  • [17] Solution-Processed Sintered Nanocrystal Solar Cells via Layer-by-Layer Assembly
    Jasieniak, Jacek
    MacDonald, Brandon I.
    Watkins, Scott E.
    Mulvaney, Paul
    [J]. NANO LETTERS, 2011, 11 (07) : 2856 - 2864
  • [18] Soluble Precursors for CuInSe2, Culn1-xGaxSe2, and Cu2ZnSn(S,Se)4 Based on Colloidal Nanocrystals and Molecular Metal Chalcogenide Surface Ligands
    Jiang, Chengyang
    Lee, Jong-Soo
    Talapin, Dmitri V.
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2012, 134 (11) : 5010 - 5013
  • [19] Tuning the Excitonic and Plasmonic Properties of Copper Chalcogenide Nanocrystals
    Kriegel, Ilka
    Jiang, Chengyang
    Rodriguez-Fernandez, Jessica
    Schaller, Richard D.
    Talapin, Dmitri V.
    da Como, Enrico
    Feldmann, Jochen
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2012, 134 (03) : 1583 - 1590
  • [20] Structural, optical, and electrical properties of PbSe nanocrystal solids treated thermally or with simple amines
    Law, Matt
    Luther, Joseph M.
    Song, Oing
    Hughes, Barbara K.
    Perkins, Craig L.
    Nozik, Arthur J.
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (18) : 5974 - 5985
1234