A	Acceptor
BT	Benzothieno[3,2-b]benzothiophene
BT-PCOD	1,1′-([1]benzothieno[3,2-b][1]benzothiene-2,7-diylbis(4,1-phenylene))bis(undecan-1-one)
BT-PD	2,7-bis(4-decylphenyl)[1]benzothieno[3,2-b][1]benzothiophene
BT-PDD	2,2′-([1]benzothieno[3,2-b][1]benzothiene-2,7-diylbis(4,1-phenyleneundec-1-yl-1-ylidene))dimalononitrile
CV	Cyclic voltammetry
D	Donor
DFT	Density functional theory
DSC	Differential scanning calorimetry
EWG	Electron-withdrawing group
GPC	Gel permeation chromatography
HOMO	Highest occupied molecular orbital
ID	Indolo[3,2-b]indole
ID-PCOD	1,1′-[(5,10-dimethyl-5,10-dihydroindolo[3,2-b]indole-2,7-diyl)bis(4,1-phenylene)]diundecan-1-one
ID-PD	2,7-bis(4-decylphenyl)-5,10-dimethyl-5,10-dihydroindolo[3,2-b]indole
ID-PDD	2,2′-[(5,10-dimethyl-5,10-dihydroindolo[3,2-b]indole-2,7-diyl)bis(4,1-phenyleneundec-1-yl-1-ylidene)]dimalononitrile
IPTMDOB	2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
LUMO	Lowest unoccupied molecular orbital
MALDI-TOF	Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry
OFET	Organic field-effect transistor
OLED	Organic light-emitting diode
PLQY	Photoluminescence quantum yield
POM	Polarized optical microscopy
SCE	Saturated calomel electrode
SWAXS	Small- and wide-angle X-ray scattering
TDDFT	Time-dependent density functional theory
TGA	Thermogravimetric analysis
THF	Tetrahydrofuran
XRD	X-ray diffraction