F-V/SMS: A new technique for studying the structure and dynamics of single molecules and nanoparticles

被引:46
作者
Gesquiere, AJ [1 ]
Park, SJ [1 ]
Barbara, PF [1 ]
机构
[1] Univ Texas, Dept Chem & Biochem, Ctr Nano & Mol Sci & Technol, Austin, TX 78712 USA
关键词
D O I
10.1021/jp049583f
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 recently introduced a new technique for semiconductor nanoparticle research that involves simultaneous single molecule spectroscopy (SMS) and controllable oxidation/reduction in an electronic device. This paper shows that the new technique, denoted by fluorescence-voltage single molecule spectroscopy (F-V/SMS), is analogous to current vs voltage (I-V) measurements for devices and electrochemical cells. F-V/SMS data are reported for single molecules (nanoparticles) of the conjugated polymer MEH-PPV as a function of bias voltage on the device and bias sweep rate to obtain information on both the energetics and kinetics of the charge transfer (oxidation/reduction) process in situ on the nanoscale. The extensive F-V/SMS data presented herein reveal that the dynamics for oxidation/reduction of MEH-PPV nanoparticles are controlled by various factors including filling of deep hole traps in the charge transporting layer of the device, the oxidation/ reduction chemical "state" of the MEH-PPV molecule, and the molecular scale heterogeneity of the device.
引用
收藏
页码:10301 / 10308
页数:8
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共 61 条
[1]   Electrochemistry and electrogenerated chemiluminescence processes of the components of aluminum quinolate/triarylamine, and related organic light-emitting diodes [J].
Anderson, JD ;
McDonald, EM ;
Lee, PA ;
Anderson, ML ;
Ritchie, EL ;
Hall, HK ;
Hopkins, T ;
Mash, EA ;
Wang, J ;
Padias, A ;
Thayumanavan, S ;
Barlow, S ;
Marder, SR ;
Jabbour, GE ;
Shaheen, S ;
Kippelen, B ;
Peyghambarian, N ;
Wightman, RM ;
Armstrong, NR .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1998, 120 (37) :9646-9655
[2]   Evidence for a thermal contribution to emission intermittency in single CdSe/CdS core/shell nanocrystals [J].
Banin, U ;
Bruchez, M ;
Alivisatos, AP ;
Ha, T ;
Weiss, S ;
Chemla, DS .
JOURNAL OF CHEMICAL PHYSICS, 1999, 110 (02) :1195-1201
[3]   Contemporary issues in electron transfer research [J].
Barbara, PF ;
Meyer, TJ ;
Ratner, MA .
JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (31) :13148-13168
[4]   Three-dimensional orientations of polymer-bound single molecules [J].
Bartko, AP ;
Dickson, RM .
JOURNAL OF PHYSICAL CHEMISTRY B, 1999, 103 (16) :3053-3056
[5]   Interfacial charges in organic hetero-layer light emitting diodes probed by capacitance-voltage measurements [J].
Berleb, S ;
Brütting, W ;
Paasch, G .
SYNTHETIC METALS, 2001, 122 (01) :37-39
[6]   Interfacial charges and electric field distribution in organic hetero-layer light-emitting devices [J].
Berleb, Stefan ;
Bruetting, Wolfgang ;
Paasch, Gernot .
ORGANIC ELECTRONICS, 2000, 1 (01) :41-47
[7]   Statistical aging and nonergodicity in the fluorescence of single nanocrystals [J].
Brokmann, X ;
Hermier, JP ;
Messin, G ;
Desbiolles, P ;
Bouchaud, JP ;
Dahan, M .
PHYSICAL REVIEW LETTERS, 2003, 90 (12) :4-120601
[8]   LIGHT-EMITTING-DIODES BASED ON CONJUGATED POLYMERS [J].
BURROUGHES, JH ;
BRADLEY, DDC ;
BROWN, AR ;
MARKS, RN ;
MACKAY, K ;
FRIEND, RH ;
BURN, PL ;
HOLMES, AB .
NATURE, 1990, 347 (6293) :539-541
[9]   The Schottky energy barrier dependence of charge injection in organic light-emitting diodes [J].
Campbell, IH ;
Davids, PS ;
Smith, DL ;
Barashkov, NN ;
Ferraris, JP .
APPLIED PHYSICS LETTERS, 1998, 72 (15) :1863-1865
[10]   Direct measurement of conjugated polymer electronic excitation energies using metal/polymer/metal structures [J].
Campbell, IH ;
Hagler, TW ;
Smith, DL ;
Ferraris, JP .
PHYSICAL REVIEW LETTERS, 1996, 76 (11) :1900-1903