Synthesis of low band gap polymers - a challenge for organic chemists

Hanack, Michael; Dürr, Kai; Lange, Armin; Barcina, José Osío; Pohmer, Jörg; Witke, Elisabeth

doi:10.1016/0379-6779(94)03256-6

Cited by 33 publications

(19 citation statements)

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“…124 A significant amount of these kind of coordination polymers based on metallophthalocyanines and metalloporphyrines with several bridging ligands, [MPc/P(L)] n (Pcs = phthalocyanines, P = porphyrines; M = Fe, Co, Mn, Ru, Os; and L = cyano, pyrazine, tetrazine and many others bidentate ligands), have been investigated as potential electrical conductors. 125,126 These compounds showed low conductivity values in the lower part of the semiconducting region. However, doping these polymers with iodine increases conductivity up to values between 10 À5 -10 À2 S cm À1 .…”

Section: Systems Containing Metallomacrocyclesmentioning

confidence: 99%

Electrical conductive coordination polymers

et al. 2012

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Section: Systems Containing Metallomacrocyclesmentioning

confidence: 99%

Electrical conductive coordination polymers

et al. 2012

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“…Examples for large π systems are phthalocyanines [24,25], naphthalocyanines [26,27] and perylenes [28,29]. Sulfur in a conjugated system also tends to reduce Eg.…”

Section: Bandgapmentioning

confidence: 99%

ELECTRICAL PROPERTIES OF P3HT (POLY [3-HEXYLTHIOPHENE])/n-TYPE CRYSTALLINE SILICON (n-c-Si) SOLAR CELLS

Nolasco

Castro-Carranza

Iñı́guez

et al. 2011

Int. J. Hi. Spe. Ele. Syst.

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Au/P3HT (poly [3-hexylthiophene])/n-type crystalline silicon (n-c-Si) solar cells have been fabricated. The Aluminum back contact is obtained by evaporation on silicon substrate. An 80 nm P3HT layer thick was spin-coated on silicon substrate followed by thermal annealing. Finally golden contacts are deposited by sputtering. The best characteristics of this flawed solar cell are: Voc=0.47 V, Isc=7.42 mA/cm 2 and an efficiency of 1.29%. The area of this device is 0.07 cm 2 . In order to get a deep understanding of the electrical properties of the heterojunction, capacitance-voltage and current-voltage-temperature measurements have been made. A compact electrical equivalent circuit has been used to describe the dark current-voltage characteristics. It is based on the combination of two exponential mechanisms, shunt and series resistances and space-charge limited current terms. From the temperature dependence of the extracted parameters we can obtain the limiting conduction mechanism. We found that the polymeric layer limits the current not only at low voltages, through Multi-Tunneling Capture Emission, but also at high voltages, through series resistance and Space-Charge Limited Current. On the other hand, the Silicon wafer limits the current at medium voltages, through the diffusion mechanism. In addition, the model is useful to estimate the open circuit voltage and built in voltage of the solar cell using only dark current voltage measurements.Keywords: P3HT; conduction mechanisms; equivalent circuit.where J D1 and J D2 are density currents of two ideal exponential diodes with their respective reverse saturation currents J S1 , J S2 and exponential factors A 1 , A 2 . R S and R SH are the series and shunt resistance, respectively. The J SCLC is a mechanism of Space Charge Limited Current. Eight circuital model parameters (J S1 , A 1 , J S2 , A 2 , R S , k, m and R SH ) are extracted using a numerical procedure, reported elsewhere [11]. V D , V B and V J are the applied voltage, the voltage drop in the bulk and the voltage drop in the junction, respectively.

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“…Ł These include phthalocyanine "shish kebab" polymers (75,76), ferrocene-containing polymers (77), mixed spin coordination systems (78), etc. Earlier examples include the characterization of solid-state polymeric amorphous Fe II (bpy)(NCS) by Mössbauer spectroscopy along with absorption and vibrational spectroscopies and magnetic susceptibility measurements (79).…”

Section: Mössbauer Spectroscopymentioning

confidence: 99%

Inorganic Polymer Characterization

Archer

2001

Inorganic and Organometallic Polymers

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Synthesis of low band gap polymers - a challenge for organic chemists

Cited by 33 publications

References 1 publication

Electrical conductive coordination polymers

Electrical conductive coordination polymers

ELECTRICAL PROPERTIES OF P3HT (POLY [3-HEXYLTHIOPHENE])/n-TYPE CRYSTALLINE SILICON (n-c-Si) SOLAR CELLS

Inorganic Polymer Characterization

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