A synergistic assembly of nanoscale lamellar photoconductor hybrids

被引:120
作者
Sofos, Marina [1 ]
Goldberger, Joshua [2 ]
Stone, David A. [2 ]
Allen, Jonathan E. [1 ]
Ma, Qing [3 ]
Herman, David J. [1 ]
Tsai, Wei-Wen [2 ]
Lauhon, Lincoln J. [1 ]
Stupp, Samuel I. [1 ,2 ,4 ]
机构
[1] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA
[2] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA
[3] Northwestern Univ, Synchrotron Res Ctr, DND CAT, Argonne, IL 60439 USA
[4] Northwestern Univ, Feinberg Sch Med, Chicago, IL 60611 USA
基金
美国国家科学基金会;
关键词
NANOSTRUCTURED ZNO FILMS; CONJUGATED POLYMERS; CHARGE-CARRIERS; ENERGY-TRANSFER; SOLAR-CELLS; PHOTODETECTORS; TRANSISTORS; MOLECULES; SINGLE; LAYERS;
D O I
10.1038/NMAT2336
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
Highly ordered nanostructured organic/inorganic hybrids offer chemical tunability, novel functionalities and enhanced performance over their individual components. Hybrids of complementary p-type organic and n-type inorganic components have attracted interest in optoelectronics, where high-efficiency devices with minimal cost are desired. We demonstrate here self-assembly of a lamellar hybrid containing periodic and alternating 1-nm-thick sheets of polycrystalline ZnO separated by 2-3 nm layers of conjugated molecules, directly onto an electrode. Initially the electrodeposited inorganic is Zn(OH)(2), but pi-pi interactions among conjugated molecules stabilize synergistically the periodic nanostructure as it converts to ZnO at 150 degrees C. As photoconductors, normalized detectivities (D*) greater than 2 x 10(10) Jones, photocurrent gains of 120 at 1.2V mu m(-1) and dynamic ranges greater than 60 dB are observed on selective excitation of the organic. These are among the highest values measured for organic, hybrid and amorphous silicon, making them technologically competitive as low-power, wavelength-tunable, flexible and environmentally benign photoconductors.
引用
收藏
页码:68 / 75
页数:8
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