Optoelectronic Properties of Natural Cyanin Dyes

被引:24
作者
Calzolari, A. [1 ]
Varsano, D. [1 ]
Ruini, A. [1 ,2 ]
Catellani, A. [3 ]
Tel-Vered, R. [4 ]
Yildiz, H. B. [4 ]
Ovits, O. [4 ]
Willner, I. [4 ]
机构
[1] CNR INFM, Natl Ctr NanoStruct & BioSyst Surf S3, I-41100 Modena, Italy
[2] Univ Modena & Reggio Emilia, Dipartimento Fis, I-41100 Modena, Italy
[3] CNR IMEM, I-43100 Parma, Italy
[4] Hebrew Univ Jerusalem, Inst Chem, IL-91904 Jerusalem, Israel
关键词
DENSITY-FUNCTIONAL THEORY; ANTHOCYANIN PIGMENTS; EXCITED-STATES; COLOR; DNA; PSEUDOPOTENTIALS; COPIGMENTATION; ABSORPTION; CHEMISTRY; MECHANISM;
D O I
10.1021/jp904966d
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
An integrated theoretical/experimental study of the natural cyanin dye is presented in terms of its structural and optoelectronic properties for different gas-phase and prototypical device configurations. Our microscopic analysis reveals the impact of hydration and hydroxylation reactions, as well as of the attached sugar, on ground and optically excited states, and it illustrates the visible-light harvesting capability of the dye. Our optical experiments at different and controlled pH concentrations allow for a direct comparison with theoretical results. We analyze the many different contributions to photocurrent of the various portions of a prototypical device and, as a proof of principle, we propose the addition of specific ligands to control the increase of the photocurrent yield in the cyanin-based electrochemical device.
引用
收藏
页码:8801 / 8810
页数:10
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