Electrostatic self-assembly as a means to create organic photovoltaic devices

Durstock, Michael F.; Taylor, Barney E.; Spry, R. J.; Chiang, Long Y.; Reulbach, S.; Heitfeld, Kevin; Baur, Jeffery W.

doi:10.1016/s0379-6779(00)00440-9

Cited by 42 publications

(28 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While not a CPE, it is worth noting that there is a body of related work where polycationic PPV precursors and a host of different donors are used to fabricated LBL solar cells and photodetectors. [156][157][158][159][160][161][162] As reported by Yoshino and coworkers in 1996, solutions of poly(3-a-carboxylmethylthiophene) (P32) (Scheme 9) at pH ¼ 4.5 and poly(dihexyldipropargyl ammonium bromide) (P33) (Scheme 9) were used to fabricate by a LBL processes an ITO/ P32:P33/Al device containing 11-13 bilayers. [21] This group similarly prepared devices with P32 and poly(N-methyl-2,5-pyridinium vinylene) (P34) (Scheme 9), [163][164][165] as well as REVIEW the same P32:P34 devices doped with C 60 or a porphyrin derivative by using a mixed solution of P32 with an adduct of fullerene and 8-(9-anthryl)-7-oxaoctanoic acid [163] or a mixed solution of P34 with a porphyrin derivative.…”

Section: Solar Cells and Photodetectorsmentioning

confidence: 96%

Recent Applications of Conjugated Polyelectrolytes in Optoelectronic Devices

et al. 2008

View full text Add to dashboard Cite

Conjugated polyelectrolytes comprise an electronically delocalized backbone with pendant groups bearing ionic functionalities. Important new developments regarding their use to improve charge injection from metallic electrodes into organic semiconductors, a key requirement in emissive devices, have recently appeared. This article provides an overview of recent studies concerning the basic properties of conjugated polyelectrolytes as a function of molecular structure, and of optoelectronic devices with conjugated polyelectrolytes as essential functional components. Processes where more insightful mechanistic understanding is needed and areas of opportunity are discussed.

show abstract

Section: Solar Cells and Photodetectorsmentioning

confidence: 96%

Recent Applications of Conjugated Polyelectrolytes in Optoelectronic Devices

et al. 2008

View full text Add to dashboard Cite

show abstract

“…With this technique it is possible to tune the composition of the layers at molecular scale, fabricate interesting composite materials in a simple and inexpensive way onto substrates composed by almost any material and with almost any size or shape. This technique has been successfully demonstrated in many applications such as conductive coatings [7], antireflective coatings [8], sensitive coatings [9][10][11][12][13][14], organic light emitting diodes [15], photovoltaic cells [16], and so forth.…”

Section: Introductionmentioning

confidence: 99%

Study and Optimization of Self‐Assembled Polymeric Multilayer Structures with Neutral Red for pH Sensing Applications

et al. 2007

View full text Add to dashboard Cite

The characterization of nanostructured thin films is critical in the design and fabrication of optical sensors. Particularly, this work is a detailed study of the properties of layer-by-layer electrostatic self-assembled multilayer (LbL) structures fabricated using poly(allylamine hydrochloride) (PAH) and Neutral Red (NR) as cations, and poly(acrylic acid) (PAA) as polyanion. These LbL films, due to the colorimetric properties of the NR, are suitable for sensor applications such as pH sensing in the physiological range. In the (PAH+NR/PAA) LbL structure, it has been observed a very important influence of the pH of the solutions in the properties of the resultant films. Different techniques such as spectroscopy and atomic force microscopy (AFM) are combined to characterize the films, and the results are analyzed showing coherence with previous works. The LbL structure is finally optimized and dramatically improved nanostructured films were fabricated, showing good sensing properties, short response times, and good stability.

show abstract

“…More recently, this approach was used in the fabrication of polymer thin films for optoelectronic devices, such as field-effect transistors, [9] lightemitting devices, [10][11][12][13][14][15] and photovoltaic cells. [16][17][18][19] A relatively low turn-on voltage was observed in the light-emitting diodes fabricated by multilayer deposition, which was attributed to the defect-free films obtained. [10] Although the performances of these devices were not satisfactory compared to those of the extensively studied multilayer organic devices, the LBL deposition method provides an alternative approach to fabricate multilayer thin films.…”

Section: Introductionmentioning

confidence: 99%

Layer‐by‐Layer Deposition of Rhenium‐Containing Hyperbranched Polymers and Fabrication of Photovoltaic Cells

Tse

Man

Cheng

et al. 2006

Chemistry A European J

View full text Add to dashboard Cite

Multilayer thin films were prepared by the layer‐by‐layer (LBL) deposition method using a rhenium‐containing hyperbranched polymer and poly[2‐(3‐thienyl)ethoxy‐4‐butylsulfonate] (PTEBS). The radii of gyration of the hyperbranched polymer in solutions with different salt concentrations were measured by laser light scattering. A significant decrease in molecular size was observed when sodium trifluoromethanesulfonate was used as the electrolyte. The conditions of preparing the multilayer thin films by LBL deposition were studied. The growth of the multilayer films was monitored by absorption spectroscopy and spectroscopic ellipsometry, and the surface morphologies of the resulting films were studied by atomic force microscopy. When the pH of a PTEBS solution was kept at 6 and in the presence of salt, polymer films with maximum thickness were obtained. The multilayer films were also fabricated into photovoltaic cells and their photocurrent responses were measured upon irradiation with simulated air mass (AM) 1.5 solar light. The open‐circuit voltage, short‐circuit current, fill factor, and power conversion efficiency of the devices were 1.2 V, 27.1 μ A cm−2, 0.19, and 6.1×10−3 %, respectively. The high open‐circuit voltage was attributed to the difference in the HOMO level of the PTEBS donor and the LUMO level of the hyperbranched polymer acceptor. A plot of incident photon‐to‐electron conversion efficiency versus wavelength also suggests that the PTEBS/hyperbranched polymer junction is involved in the photosensitization process, in which a maximum was observed at approximately 420 nm. The relatively high capacitance, determined from the measured photocurrent rise and decay profiles, can be attributed to the presence of large counter anions in the polymer film.

show abstract

Electrostatic self-assembly as a means to create organic photovoltaic devices

Cited by 42 publications

References 17 publications

Recent Applications of Conjugated Polyelectrolytes in Optoelectronic Devices

Recent Applications of Conjugated Polyelectrolytes in Optoelectronic Devices

Study and Optimization of Self‐Assembled Polymeric Multilayer Structures with Neutral Red for pH Sensing Applications

Layer‐by‐Layer Deposition of Rhenium‐Containing Hyperbranched Polymers and Fabrication of Photovoltaic Cells

Contact Info

Product

Resources

About