Luminosyn™ DPP-DTT (also referred to as PDPP2T-TT-OD) is now available featuring:
High molecular weight - higher molecular weight offers higher charge mobility
High purity - DPP-DTT is purified via Soxhlet extraction with methanol, hexane and chlorobenzene under an argon atmosphere
Batch-specific GPC data - so you have confidence in what you are ordering. Also, GPC data is always convenient for your thesis and publications
Large quantity orders - so you can plan your experiments with polymer from the same batch
價格
Batch | Quantity | Price |
M315 | 100 mg | 4800.45 |
M315 | 250 mg | 8011.45 |
M315 | 500 mg | 12635.29 |
M315 | 1g | 20871.50 |
M315 | 2g | 36926.50 |
*for 5 - 10 grams order quantity, the lead time is 4-6 weeks.
Batch Details
Batch | Mw | Mn | PDI |
M314 | 292,200 | 74,900 | 3.90 |
M315 | 278,781 | 76,323 | 3.65 |
General Information
Synonyms | PDBT-co-DTT PTT-DTDPP PDPP-DTT DPPT-TT DPP-TTT PDPP2T-TT PDPP2T-TT-OD DPPDTT Poly[2,5-(2-octyldodecyl)-3,6-diketopyrrolopyrrole-alt-5,5-(2,5-di(thien-2-yl)thieno [3,2-b]thiophene)] |
CAS number | 1260685-66-2 (1444870-74-9) |
Chemical formula | (C60H88N2O2S4)n |
HOMO/LUMO | HOMO = -5.2 eV, LUMO = -3.5 eV [2] |
Solubility | Chloroform, chlorobenzene and dichlorobenzene |
Classification/Family | Bithiophene, Thienothiophene, Organic semiconducting materials, Low band-gap polymers, Organic photovoltaics, Polymer solar cells, OFETs |
Chemical structure and product image of DPP-DTT, CAS No. 260685-66-2.
OFET and Sensing Applications
The exceptional high mobility of this polymer of up to 10 cm2/Vs [2] via solution-processed techniques, combined with its intrinsic air stability (even during annealing) has made PDPP2T-TT-OD of significant interest for OFET and sensing purposes.
While the highest mobilities require exceptional molecular weights of around 500 kD (ａnd with commensurate solubility issues), high mobilities in the region of 1-3 cm2/Vs can still be achieved with good solution-processing at around 250 kD. As such, we have made a range of molecular weights available to allow for different processing techniques.
In our own tests, we have found that by using simple spin-coating onto an OTS-treated silicon substrate (using our prefabricated test chips), high mobilities comparable to the literature can be achieved (1-3 cm2/Vs). Further improvements may also be possible with more advanced strain-inducing deposition techniques.
Example OFET characteristics for DPP-DTT (M313) solution processed from chlorobenzene on a 300 nm SiO2 substrate treated with OTS. Output characteristic (top left), transfer curves (top right), mobility fitting (bottom left) and calculated mobility (bottom right).
Photovoltaic Applications
Although shown as a promising hole-mobility polymer for OFETs, when used as the donor material in a bulk heterojunction photovoltaic (with PC70BM as the acceptor), initial efficiencies of 1.6% were achieved for DPP-DTT [3]. The low device metrics were attributed to poor film morphology. However, a higher efficiency of 6.9% was achieved by using thicker film (220 nm) [4].
PDPP2T-TT-OD has also recently been used successfully as an active-layer dopant material in PTB7-based devices [5]. An improvement in device performance was observed, with average efficiencies increasing from 7.6% to 8.3% when the dopant concentration of DPP-DTT was 1 wt%. The use of DPP-DTT as a high-mobility hole-interface layer for perovskite hybrid devices has also been investigated [6].
Synthetic route
DPP-DTT synthesis: DPP-DTT was synthesised by following the procedures described in [2] and [3] (please refer to the following references):
With 2-thiophenecarbonitrile and dimethyl succinate as starting materials in t-amyl alcohol, it gave 3,6-Dithiophen-2-yl-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione. Alkylation of 3,6-Dithiophen-2-yl-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione with 2-octyldodecylbromide in dimethylformamide afforded 3,6-bis(thiophen-2-yl)-2,5-bis(2-octyldodecyl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione. Further bromination gave 3,6-bis(5-bromothiophen-2-yl)-2,5-bis(2-octyldodecyl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione (M1).
Further reaction of M1 with 2,5-bis(trimethylstannyl)thieno[3,2-b]thiophene (M2) under Stille coupling conditions gave the target polymer DPP-DTT, which was further purified via Soxhlet extraction with methanol, hexane and then chloroform.
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