TY - JOUR
T1 - Nanostructured Electron-Selective Interlayer for Efficient Inverted Organic Solar Cells
AU - Song, Jiyun
AU - Lim, Jaehoon
AU - Lee, Donggu
AU - Thambidurai, M.
AU - Kim, Jun Young
AU - Park, Myeongjin
AU - Song, Hyung Jun
AU - Lee, Seonghoon
AU - Char, Kookheon
AU - Lee, Changhee
N1 - Publisher Copyright:
© 2015 American Chemical Society.
PY - 2015/8/26
Y1 - 2015/8/26
N2 - We report a unique nanostructured electron-selective interlayer comprising of In-doped ZnO (ZnO:In) and vertically aligned CdSe tetrapods (TPs) for inverted polymer:fullerene bulkheterojunction (BHJ) solar cells. With dimension-controlled CdSe TPs, the direct inorganic electron transport pathway is provided, resulting in the improvement of the short circuit current and fill factor of devices. We demonstrate that the enhancement is attributed to the roles of CdSe TPs that reduce the recombination losses between the active layer and buffer layer, improve the hole-blocking as well as electron-transporting properties, and simultaneously improve charge collection characteristics. As a result, the power conversion efficiency of PTB7:PC70BM based solar cell with nanostructured CdSe TPs increases to 7.55%. We expect this approach can be extended to a general platform for improving charge extraction in organic solar cells.
AB - We report a unique nanostructured electron-selective interlayer comprising of In-doped ZnO (ZnO:In) and vertically aligned CdSe tetrapods (TPs) for inverted polymer:fullerene bulkheterojunction (BHJ) solar cells. With dimension-controlled CdSe TPs, the direct inorganic electron transport pathway is provided, resulting in the improvement of the short circuit current and fill factor of devices. We demonstrate that the enhancement is attributed to the roles of CdSe TPs that reduce the recombination losses between the active layer and buffer layer, improve the hole-blocking as well as electron-transporting properties, and simultaneously improve charge collection characteristics. As a result, the power conversion efficiency of PTB7:PC70BM based solar cell with nanostructured CdSe TPs increases to 7.55%. We expect this approach can be extended to a general platform for improving charge extraction in organic solar cells.
KW - CdSe tetrapods
KW - bulkheterojunction
KW - electron buffer layer
KW - electron-selective interlayer
KW - nanostructured extraction layer
KW - organic-inorganic hybrid solar cells
UR - http://www.scopus.com/inward/record.url?scp=84940512572&partnerID=8YFLogxK
U2 - 10.1021/acsami.5b04624
DO - 10.1021/acsami.5b04624
M3 - Article
AN - SCOPUS:84940512572
SN - 1944-8244
VL - 7
SP - 18460
EP - 18466
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 33
ER -
