Electrochemically deposited ZnO Nanostructure based Hybrid Solar Cell by ill20582


									   Electrochemically deposited ZnO Nanostructure based
                    Hybrid Solar Cell

Dong Chan Lim*, Mi Yeong Park, Yeong-Tae Kim, Kyu Hwan Lee, Young Soo Jeong
      Korea Institute of Materials Science (KIMS), Materials Processing Division
          531 Changwondaero, Changwon, Gyeongnam, 641-831, Korea

In the operation of the typical polymer-fullerene blend bulk heterojunction solar cell,
electrons generated in the active layer are collected by the back electrode like Al, and
holes are collected by the front like transparent conducting oxide of ITO. However the
main disadvantage of typical polymer based solar cells is low intrinsic carrier mobility
especially. Very recently, it has been reported that this disadvantage can be improved
by adopting the 1-D nanostructures such as CNT and/or nanowire onto the solar cell.
The ZnO nanostructures such as thin film, nanowire, nanoparticle, nanowall etc. are
very interesting materials for the electrode of energy conversion materials especially.
In this study, inversion of the solar cell device was accomplished by using zinc oxide
(ZnO) nanostructures between ITO and polymer-active layer deposited by using
electrochemical method which acts as the hole-blocking layer and more efficient
electron collector as well as Ag was deposited as back electrode for generated-hole
collector. One can demonstrated that the electrical and optical characteristics of these
ZnO based solar cell can be changed depending on the orientation of ZnO
nanostructures. ZnO nanowall with single crystalline structure based solar cell shows
high Jsc value compared with those of other nanostructures.

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