| Autor: |
Whittaker‐Brooks, Luisa, McClain, William E., Schwartz, Jeffrey, Loo, Yueh‐Lin |
| Předmět: |
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| Zdroj: |
Advanced Energy Materials; Nov2014, Vol. 4 Issue 16, pn/a-N.PAG, 7p |
| Abstrakt: |
The adsorption of self-assembled monolayers (SAMs) on metal oxide surfaces is a promising route to control electronic characteristics and surface wettability. Here, arylphosphonic acid derivatives are used to modulate the surface properties of vertically oriented ZnO nanowire arrays. Arylphosphonate-functionalized ZnO nanowires are incorporated into hybrid organic-inorganic solar cells in which infiltrated poly(3-hexylthiophene) (P3HT) serves as the polymer donor. Strong correlations between device short-circuit current density ( Jsc) and power conversion efficiencies (PCEs) with ZnO surface functionalization species are observed and a weak correlation in the open-circuit voltage ( Voc) is observed. Inverted solar cells fabricated with these treated interfaces exhibit PCEs as high as 2.1%, primarily due to improvements in Jsc. Analogous devices using untreated ZnO arrays having efficiencies of 1.6%. The enhancement in Jsc is attributed to surface passivation of ZnO by SAMs and enhanced wettability from P3HT, which improve charge transfer and reduce carrier recombination at the organic-inorganic interface in the solar cells. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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