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

Nanoscale Phase Separation and High Photovoltaic Efficiency in Solution-Processed, Small-Molecule Bulk Heterojunction Solar Cells

Blend Ratio--Annealing Temp-------JSC-------- VOC-----FF----- h [%]
60-40--------------110--------------10.0-------- 0.92--- 0.48----4.4

Volume 19 Issue 19, Pages 3063 - 3069

A Low Band Gap, Solution Processable Oligothiophene with a Diketopyrrolopyrrole Core for Use in Organic Solar Cells

J. Phys. Chem. C, 2008, 112 (30), pp 11545–11551

J. Phys. Chem. C, 2008, 112 (39), pp 15543–15552

J. Phys. Chem. C, 2008, 112 (44), pp 17402–17407

Benzothiadiazole-Based Linear and Star Molecules: Design, Synthesis, and Their Application in Bulk Heterojunction Organic Solar Cells

solar cells fabricated with corresponding linear molecules and PC₇₁BM. A power conversion efficiency (PCE) of 1.8%, with J_sc = 4.9 mA/cm², V_oc = 0.92 V, and FF = 0.41 was achieved with one of these star molecules.

Chem. Mater., 2009, 21 (21), pp 5327–5334

DOI: 10.1021/cm902611b

Solution-Processable Star-Shaped Photovoltaic Organic Molecule with Triphenylamine Core and Benzothiadiazole−Thiophene Arms

The OSC device based on a blend of S(TPA-BT-4HT) and [70]PCBM (1:3, w/w) exhibited an I_sc of 8.58 mA/cm², a V_oc of 0.85 V, and a FF of 32.7%, corresponding to a PCE of 2.39%, under the illumination of AM.1.5, 100 mW/cm². The I_sc of 8.58 mA/cm² and PSC of 2.39% are among the highest values for the OSCs based on the solution-processable organic molecules reported so far.

Macromolecules, 2009, 42 (20), pp 7619–7622

DOI: 10.1021/ma901896n

Dibenzo[b,def]chrysene Derivatives: Solution-Processable Small Molecules that Deliver High Power-Conversion Efficiencies in Bulk Heterojunction Solar

Table 1. BHJ Solar Cell Parameters for Optimized Thickness and DBC:PCBM Ratios

	device
	a	b	c	d
donor material	3	3	3	2
DBC: PCBM (mg: mg)	10:10	10:10	20:20	10:10
solvent (1 mL)	PhCl	CHCl3	CHCl3	CHCl3
optimum spin speed (rpm)	3000	4000	8500	4500
optimum thickness (nm)	150	90	85	75
VOC (V)	0.26	0.78	0.83	0.91
JSC (mA/cm2)	0.003	4.73	6.55	5.19
fill factor	0.28	0.41	0.41	0.47
optimized efficiency, η (%)	0.005	1.51	2.25	2.22

10.1021/cm9028337

Amphiphilic Molecular Design as a Rational Strategy for Tailoring Bicontinuous Electron Donor and Acceptor Arrays: Photoconductive Liquid Crystalline

For tailoring solution-processable optoelectronic thin films, a rational strategy with amphiphilic molecular design is proposed. A donor−acceptor dyad consisting of an oligothiophene and C ₆₀, when modified with a hydrophilic wedge on one side and a paraffinic wedge on the other ( 1 _Amphi ), forms over a wide temperature range a photoconducting smectic A liquid crystal having bicontinuous arrays of densely packed donor and acceptor units. In contrast, when modified with only paraffinic wedges ( 1 _Lipo ), the dyad forms a smectic A liquid crystalline mesophase, which however is poorly conductive. As indicated by an absorption spectral feature along with a synchrotron radiation small-angle X-ray scattering profile, 1 _Lipo in the lamellar structure does not adopt a uniform head/tail orientation. Such defective donor and acceptor arrays likely contain a large number of trapping sites, leading to short-lived charge carriers, as observed by a flash photolysis time-resolved microwave conductivity study.

J. Am. Chem. Soc., 2008, 130 (28), pp 8886–8887