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754005

Sigma-Aldrich

PCPDTBT

average Mw 7,000-20,000

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Synonym(s):
Poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta [2,1-b;3,4-b′]dithiophene)-alt-4,7(2,1,3-benzothiadiazole)]
Linear Formula:
(C31H38N2S3)n
CAS Number:
NACRES:
NA.23

description

Band gap: 1.75 eV

form

solid

mol wt

average Mw 7,000-20,000

loss

0.5 wt. % TGA, 350 °C

mp

>400 °C

λmax

700 nm

Orbital energy

HOMO -5.3 eV 
LUMO -3.55 eV 

OPV Device Performance

ITO/PEDOT:PSS/PCPDTBT:PC61BM/Al

  • Short-circuit current density (Jsc): 16.2 mA/cm2
  • Open-circuit voltage (Voc): 0.62 V
  • Fill Factor (FF): 0.55
  • Power Conversion Efficiency (PCE): 5.2 %

semiconductor properties

P-type (mobility=2×10−2 cm2/V·s)

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This Item
772410794333901099
PCPDTBT average Mw 7,000-20,000

Sigma-Aldrich

754005

PCPDTBT

PTB7 average Mw 80,000-200,000, PDI ≤3.0

Sigma-Aldrich

772410

PTB7

PTB7-Th

Sigma-Aldrich

794333

PTB7-Th

PBDB-T

Sigma-Aldrich

901099

PBDB-T

mp

>400 °C

mp

-

mp

-

mp

>200 °C

description

Band gap: 1.75 eV

description

Band gap: 1.84 eV

description

Band gap: 1.57 eV, Shiny, purple, fiber-like solid

description

Band gap: 1.8 eV, Limited solubility in CHCl3

mol wt

average Mw 7,000-20,000

mol wt

average Mw 80,000-200,000

mol wt

>145,000

mol wt

Mw >50,000 by GPC (GPC standard: PS)

loss

0.5 wt. % TGA, 350 °C

loss

-

loss

-

loss

-

λmax

700 nm

λmax

680 nm (thin film)

λmax

-

λmax

-

General description

PCPDTBT is a low band gap polymer that is used as a donor material with a high photovoltaic efficiency. It can form blends with a variety of conducting polymers which can be used to enhance the power conversion efficiency (PCE) in an electrochemical device.
Soluble in cyclohexane, toluene, chloroform, and THF

Application

PCPDTBT can form a donor/acceptor blend with PCBM which can be used as a polymeric backbone for use in the fabrication of organic solar cells.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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David Muhlbacher,
Advanced Materials, 18, 2884-2889 (2006)
Efficiency enhancement for bulk-heterojunction hybrid solar cells based on acid treated CdSe quantum dots and low bandgap polymer PCPDTBT
Zhou Y, et al.
Solar Energy Materials and Solar Cells, 95(4), 1232-1237 (2011)
Small Bandgap Polymers for Organic Solar Cells (Polymer Material Development in the Last 5 Years)
Kroon, R.; Lenes, M.; Hummelen, J.; et al.
Polymer Reviews, 48, 531-582 (2008)
J Peet et al.
Nature materials, 6(7), 497-500 (2007-05-29)
High charge-separation efficiency combined with the reduced fabrication costs associated with solution processing and the potential for implementation on flexible substrates make 'plastic' solar cells a compelling option for tomorrow's photovoltaics. Attempts to control the donor/acceptor morphology in bulk heterojunction
Bulk heterojunction bipolar field-effect transistors processed with alkane dithiol
Cho S, et al.
Organic Electronics, 9(6), 1107-1111 (2008)

Articles

The development of high-performance conjugated organic molecules and polymers has received widespread attention in industrial and academic research.

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Organic photovoltaics (OPVs) represent a low-cost, lightweight, and scalable alternative to conventional solar cells. While significant progress has been made in the development of conventional bulk heterojunction cells, new approaches are required to achieve the performance and stability necessary to enable commercially successful OPVs.

There is widespread demand for thin, lightweight, and flexible electronic devices such as displays, sensors, actuators, and radio-frequency identification tags (RFIDs). Flexibility is necessary for scalability, portability, and mechanical robustness.

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