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Optimization of Si NC/P3HT Hybrid Solar Cells
Author(s) -
Liu ChinYi,
Holman Zachary C.,
Kortshagen Uwe R.
Publication year - 2010
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200902471
Subject(s) - materials science , annealing (glass) , open circuit voltage , acceptor , hybrid solar cell , work function , optoelectronics , polymer solar cell , organic solar cell , short circuit , cathode , silicon , energy conversion efficiency , solar cell , electrode , electron mobility , metal , voltage , polymer , condensed matter physics , chemistry , electrical engineering , composite material , physics , metallurgy , engineering
Silicon nanocrystals (Si NCs) are shown to be an electron acceptor in hybrid solar cells combining Si NCs with poly(3‐hexylthiophene) (P3HT). The effects of annealing and different metal electrodes on Si NC/P3HT hybrid solar cells are studied in this paper. After annealing at 150 °C, Si NC/P3HT solar cells exhibit power conversion efficiencies as high as 1.47%. The hole mobility in the P3HT phase extracted from space‐charge‐limited current measurements of hole‐only devices increases from 2.48 × 10 −10 to 1.11 × 10 −9 m 2 V −1 s −1 after annealing, resulting in better transport in the solar cells. A quenching of the open‐circuit voltage and short‐circuit current is observed when high work function metals are deposited as the cathode on Si NC/P3HT hybrid devices.