The influence of the optoelectronic properties of poly(3-alkylthiophenes) on the device parameters in flexible polymer solar cells

Al‐Ibrahim, Maher; Roth, H.-K.; Schroedner, M.; Konkin, A. A.; Zhokhavets, Uladzimir; Gobsch, G.; Scharff, P.; Sensfuß, Steffi

doi:10.1016/j.orgel.2005.02.004

Cited by 234 publications

(177 citation statements)

References 39 publications

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“…S1). 19 The LUMO level of P3DDTe, which was calculated from the optical bandgap and HOMO energy level, was found to be 23.72 eV. These results demonstrated that the replacement of thiophene with tellurophene resulted in a significant reduction in the bandgap, because the tellurium atoms acted to stabilize the LUMO level, whose results are well corresponding with previous reported work.…”

Section: Rapid Communication Wwwpolymerchemistryorg Journal Of Polysupporting

confidence: 88%

“…The optical bandgap (E g ) of P3DDTe in the thin films was 1.48 eV, which was significantly lower than that of P3DDT (1.74 eV). 19 The HOMO level of the polymer film was estimated from cyclic voltammograms using the equation E HOMO 5 2(E ox 1 4.8), where E ox is the onset oxidation potential relative to the ferrocene standard material. 20 The HOMO energy level of P3DDTe was found to be 25.20 eV, which was similar to that of thiophene analogue polymer (P3DDT, 25.20 eV) (Supporting Information Fig.…”

Section: Rapid Communication Wwwpolymerchemistryorg Journal Of Polymentioning

confidence: 99%

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Synthesis and characterization of regioregular poly(3‐dodecyltellurophene)

Lee

Shin

et al. 2013

J. Polym. Sci. Part A: Polym. Chem.

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Section: Rapid Communication Wwwpolymerchemistryorg Journal Of Polysupporting

confidence: 88%

Section: Rapid Communication Wwwpolymerchemistryorg Journal Of Polymentioning

confidence: 99%

Synthesis and characterization of regioregular poly(3‐dodecyltellurophene)

Lee

Shin

et al. 2013

J. Polym. Sci. Part A: Polym. Chem.

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“…Solution-based polymers can be rapidly deposited using printing technologies and are compatible with light-weight flexible substrates that can increase the range of available PV applications. 1,2 In the past ten years, the efficiency of polymer based PV devices has increased from ~1% 3 to over 10%.…”

Section: Introductionmentioning

confidence: 99%

Final Closeout report for grant FG36-08GO18018, titled: Functional Multi-Layer Solution Processable Polymer Solar Cells

Moulé¹

2012

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Original Objectives1) Develop a method to deposit multiple conjugated polymer film layers and avoid the problem of dissolution from mutually solubility 2) Use this deposition method to develop multi-layer polymer based solar cells with layers that are function specific 3) characterize these layers and devices 4) develop electrical and optical models that describe and predict the properties of the multi-layers 5) Ultimate efficiency goals are ~6.75% with J sc = 12 mA/cm 2 , FF = 0.75, and Voc = 0.75. Accomplishments on Original Objectives1) Objective Achieved -we developed a method using interface mixing that allows deposition of function specific layers at both interfaces of an organic PV layer. 2) Objective Achieved -we fabricated devices based on our deposition method that achieves the goal of blocking dark current and raising FF and V oc 3) Objective Over Achieved -we not only characterized the devices based on known methods, we developed several new methods to detect a. Vertical segregation of materials under a metal electrode using Neutron Reflectometry b. Whether doping occurs using NEXAFS c. Whether doping occurs using detection of H 2 in a GCMS 4) Objective Over Achieved -We developed accurate optical models and also performed kinetic optical studies that lead to a suggestion of a new charge separation mechanism (independently verified by Heeger group). There was considerable discussion at the Spring 2012 MRS about the mechanism. We are currently developing an inclusive electrical model in collaboration with the Reide group from Dresden, Germany. This model takes doping at interfaces into account and is an extension of work on small molecule OPV. The model correctly predicts formation of partial layers of polymer between PEDOT:PSS and the active PV layer, even when the interlayer polymer is different from the PV layer polymer. 5) Objective Not Achieved -Although we spent over $10,000 on new polymers and fullerenes, investigated new interface materials and several new materials from collaborators, we did not find a new material that increased the efficiency to over 6%. Much of the problem is that the purchased materials are of very low quality with large impurity content. We have presented analytical chemistry data about the quality problem at several conferences in 2011-12.Detailed Accomplishments -08  Purchased and setup of most equipment  Preparation of film samples and measurements using atomic force microscopy (topography, phase, conduction and Kelvin probe modes), neutron reflectometry, ultra-fast pump-probe optical laser spectroscopy, and scanning electron microscopy.  Setup of optical and electrical modeling of multi-layer films. First publication is in preparation. Detailed Accomplishments -09 Hired 3 students + cost share postdoc at 50% time  Developed a multiple layer deposition method and test to make sure layers don't mix  Determined that material layers mix upon heat tempering + electrical consequences  Developed a method for using mixed electrode-active layer interlayer to fix work f...

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“…Organic thin film PV cells made from semiconducting polymers are light weight [7], low in toxicity, offer dramatic reductions in processing costs [3,8,[9][10][11][12], tunable optical properties [7,13,14], as well as mechanical flexibility and durability [15]. However, the PCEs of organic PV cells are typically less than 2 % and no greater than 5 % [7,[10][11][12][13][16][17][18][19]. The efficiencies of these PV cells are limited by the intrinsically low carrier concentrations and mobilities of polymers [15,19,20].…”

Section: Introductionmentioning

confidence: 99%

Progress on a Photovoltaic Cell Design Consisting of Silicon Nanowires and Poly (3‐ hexylthiophene)

Noice¹

2006

McNair Scholars Online Journal

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Citation: Noice, Lori. Progress on a photovoltaic cell design consisting of silicon nanowires and poly (3-hexylthiophene). Portland State University McNair Scholars Online Journal, Vol. 2, 2006Vol. 2, -2008. Progress on a photovoltaic cell design consisting of silicon nanowires and poly(3-hexylthiopenen)Lori Noice 1 , Gary Goncher 1 , Raj Solanki 1, 2 Abstract A bulk-heterojunction photovoltaic cell design made from silicon nanowires (SiNW) and poly(3-hexylthiophene) (P3HT) could provide the photon absorption and charge transport needed for a high efficiency hybrid PV cell. Since the mechanisms associated with the inorganic/organic semiconductor heterojunction are not yet well understood, the simple design of the proposed PV cell and tunable properties of both SiNW and P3HT affords experimental optimization opportunities.

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The influence of the optoelectronic properties of poly(3-alkylthiophenes) on the device parameters in flexible polymer solar cells

Cited by 234 publications

References 39 publications

Synthesis and characterization of regioregular poly(3‐dodecyltellurophene)

Synthesis and characterization of regioregular poly(3‐dodecyltellurophene)

Final Closeout report for grant FG36-08GO18018, titled: Functional Multi-Layer Solution Processable Polymer Solar Cells

Progress on a Photovoltaic Cell Design Consisting of Silicon Nanowires and Poly (3‐ hexylthiophene)

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