10.1021/cm5002303.s002
Julien Warnan
Julien
Warnan
Clément Cabanetos
Clément
Cabanetos
Romain Bude
Romain
Bude
Abdulrahman El Labban
Abdulrahman El
Labban
Liang Li
Liang
Li
Pierre M. Beaujuge
Pierre M.
Beaujuge
Electron-Deficient <i>N</i>‑Alkyloyl
Derivatives of Thieno[3,4‑<i>c</i>]pyrrole-4,6-dione
Yield Efficient Polymer Solar Cells with Open-Circuit Voltages >
1
V
American Chemical Society
2014
polymer LUMO
0.9 V
TPD
material properties
power conversion efficiencies
ring substituents
BDT motifs
HOMO levels
BHJ device VOC
Recent work
PBDTTPD
FF
1.1 V
1 V
PCBM acceptors
device VOC
side chains
PCE
polymer donors
2014-05-13 00:00:00
Dataset
https://acs.figshare.com/articles/dataset/Electron_Deficient_i_N_i_Alkyloyl_Derivatives_of_Thieno_3_4_i_c_i_pyrrole_4_6_dione_Yield_Efficient_Polymer_Solar_Cells_with_Open_Circuit_Voltages_1_V/2297557
Poly(benzo[1,2-b:4,5-b′]dithiophene–thieno[3,4-<i>c</i>]pyrrole-4,6-dione) (PBDTTPD) polymer donors yield
some of the highest open-circuit voltages (<i>V</i><sub>OC</sub>, ca. 0.9 V) and fill factors (FF, ca. 70%) in conventional
bulk-heterojunction (BHJ) solar cells with PCBM acceptors. Recent
work has shown that the incorporation of ring substituents into the
side chains of the BDT motifs in PBDTTPD can induce subtle variations
in material properties, resulting in an increase of the BHJ device <i>V</i><sub>OC</sub> to ∼1 V. In this contribution, we
report on the synthesis of <i>N</i>-alkyloyl-substituted
TPD motifs (TPD(CO)) and show that the electron-deficient motifs
can further lower both the polymer LUMO and HOMO levels, yielding
device <i>V</i><sub>OC</sub> > 1 V (up to ca. 1.1 V)
in
BHJ solar cells with PCBM. Despite the high <i>V</i><sub>OC</sub> achieved (i.e., low polymer HOMO), BHJ devices cast from
TPD(CO)-based polymer donors can reach power conversion efficiencies
(PCEs) of up to 6.7%, making these promising systems for use in the
high-band-gap cell of tandem solar cells.