Marked Alkyl- vs Alkenyl-Substitutent Effects on Squaraine Dye Solid-State Structure, Carrier Mobility, and Bulk-Heterojunction Solar Cell Efficiency

DOI: 10.1021/ja100520q

Table 1. Comparison of Squaraine:PC_xxBM BHJ Photovoltaic Cells^a,b

Sqr./PCxxBM (wt:wt)]	dhtc [nm]	Dald [nm]	Jsc [mA/cm2]	Voc [V]	FF [%]	PCE (PCEmax) [%]
1/PC61BM (1:1)	50	65	3.83	0.49	34	0.63(0.68)
2/PC61BM (1:1)	50	65	4.31	0.59	34	0.87(0.99)
1/PC61BM (1:3)	75	35	4.13	0.54	33	0.77(0.78)
2/PC61BM (1:3)	75	35	5.15	0.56	37	1.10(1.20)
2/PC61BM (1:3)e	75	35	5.68	0.59	39	1.34(1.45)
1/PC71BM (1:3)	75	35	6.40	0.52	35	1.12(1.29)
2/PC71BM (1:3)	75	35	8.21	0.56	37	1.72(1.75)
1/PC71BM (1:3)e	75	50	7.16	0.55	37	1.39(1.47)
2/PC71BM (1:3)e	75	35	9.32	0.57	37	1.99(2.05)

Solution Processable Fluorenyl Hexa-peri-hexabenzocoronenes in Organic Field-Effect Transistors and Solar Cells

Device performance of BHJ solar cells with active layers consisting of 1:2 FHBC/PC61BM blends. Active layer thickness was 60-70 nm, and device area was 0.2 cm2. The numbers shown are average values over several devices.

Donor Annealing 150 °C, 15 s Voc [V] Jsc [mA cm-2] FF [%] [a] 4 No 0.58 -0.18 0.31 0.03 4 Yes 0.61 -0.17 0.32 0.03 5 No 0.84 -1.69 0.37 0.53 5 Yes 0.87 -2.03 0.60 1.06 6 No 0.93 -1.87 0.45 0.78 6 Yes 0.90 -2.68 0.61 1.46

[a] = Jsc × Voc × FF.

10.1002/adfm.200901827

Novel Low Band Gap Small Molecule and Phenylenevinylene Copolymer with Cyanovinylene 4-Nitrophenyl Segments: Synthesis and Application for Efficient B

Table 3. Photovoltaic Parameters of BHJ Devices Using SM:PCBM (1:1) and P:PCBM (1:1) Active Layers, Sandwiched between ITO/PEDOT:PSS and Al Electrodes

device	short circuit current (Jsc) (mA/cm2)	open circuit voltage (Voc) (V)	fill factor (FF)	power conversion efficiency (η) (%)
ITO/PEDOT:PSS/SM:PCBM (as cast)/Al	5.1	0.92	0.54	2.53
ITO/PEDOT:PSS/SM:PCBM (annealed)/Al	7.4	0.89	0.58	3.82
ITO/PEDOT:PSS/P:PCBM (as cast)/Al	3.11	0.94	0.49	1.43
ITO/PEDOT:PSS/P:PCBM (annealed)/Al	4.98	0.88	0.54	2.37

Efficient Solution-Processed Photovoltaic Cells Based on an Anthradithiophene/Fullerene Blend

materials system	Jsc (mA/cm2)	Voc (mV)	FF	I (mW/cm2)	ηP (%)	D/A	ref
ITO/hexaphenyl-substituted hexabenzocoronene:N,N‘-bis (1-thylpropyl)-3,4,9,10-perylenebis (dicarboximide) (perylene)/Al	0.034	690	0.40	0.47	b	60:40	Schmidt-Mende et al. (10)
ITO/PEDTO:PSS/star-shaped oligothiophene:PCBM/CsF/Al	1.15	850	0.24	80	0.3%	37:63	Roncali et al. (11)
ITO/PEDOT:PSS/X-shaped oligothiophene:PCBM/Al	3.65	850	0.26	100	0.8%	45:55	Sun et al. (12)
ITO/PEDOT:PSS/star-shaped triphenylamine:PCBM/Al	4.10	660	0.30	100	0.8%	25:75	Roquet et al. (13)
ITO/PEDOT:PSS/ethyl-TES-ADT:PCBM/CsF/Al	2.96	840	0.40	100	1%	70:30	this

J. Am. Chem. Soc., 2007, 129 (29), pp 9144–9149

Efficient Squaraine-Based Solution Processable Bulk-Heterojunction Solar Cells

exhibits Jsc = 5.70 mA/cm2, Voc = 0.62 V, fill-factor = 0.35, and power conversion efficiency = 1.24%

J. Am. Chem. Soc., 2008, 130 (52), pp 17640–17641
DOI: 10.1021/ja8067879

Dibenzo[f,h]thieno[3,4-b] quinoxaline-Based Small Molecules for Efficient Bulk-Heterojunction Solar Cells

sample	μe (m2 V−1 s−1)	μh (m2 V−1 s−1)	VOC (V)	JSC (mA cm−2)	FF	η (%)
1/PCBM50wt%	1.61×10−8	3.14×10−8	0.90	2.60	0.32	0.75
1/PCBM67wt%	2.94×10−8	1.95×10−8	0.89	4.15	0.46	1.70

Org. Lett., 2009, 11 (21), pp 4898–4901