BTR-Cl
BTR-Cl, highly crystalline small molecular donor
High purity and available online for fast, secure dispatch
Like its BTR derivative, BTR-Cl has a backbone consisting of a benzodithiophene (BDT) unit in conjugation with two terthiophenes and two rhodanine periphera end groups forming a coplanar structure showing nematic liquid crystal behaviour.
BTR-Cl is a highly crystalline small molecular donor with even stronger intermolecular interaction, low-lying molecular energy levels, strong intermolecular interaction, and a strong tendency for edge-on orientation.
A record-high power conversion efficiency (PCE) of 13.6% for ASM OSCs was achieved using BTR-Cl as electron donor and Y6 as electron acceptor [1]. Later on, 14.7% efficiency of the same donor acceptor BTR-Cl:Y6 system was obtained with a FF of 74.7%, and JSC of 23.66 mA cm-2 at the concentration of 18 mg/ml BTR-Cl:Y6 solution [2]. Further improvement leading to a record PCE of 15.34% was gained when 5 wt% of PC71BM was added in the active layer [3]
Device structure 1: ITO/PEDOT:PSS/BTR-Cl:Y6 (1.6:1)/Phen-NaDPO/Ag
| Thickness (nm) | VOC (V) | JSC (mA cm-2) | FF (%) | PCE (%) |
| 110 | 0.86 | 24.0 | 64.6 | 13.61 |
Device structure 2: ITO/PEDOT:PSS/BTR-Cl:Y6 (1.6:1)/Phen-NaDPO/Ag
| Thickness (nm) | VOC (V) | JSC (mA cm-2) | FF (%) | PCE (%) |
| 110 | 0.83 | 23.66 | 74.7 | 14.70 |
Total concentration of the active layer is 18 mg/ml
Device structure 3: ITO/PEDOT:PSS/BTR-Cl:Y6:5 wt% PC71BM (1.8:1:0.1)/Phen-NaDPO/Ag
| Thickness (nm) | VOC (V) | JSC (mA cm-2) | FF (%) | PCE (%) |
| 110 | 0.838 | 23.75 | 77.11 | 15.34 |
General Information
| Full name | 5,5'- [[4,8-bis[5-(2-ethylhexyl)-4-chloro-2-thienyl]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl]bis[(3',3''-dihexyl[2,2':5',2''-terthiophene]-5'',5-diyl)methylidyne ]]bis[3-hexyl-2-thioxo-4-thiazolidinone] |
| Purity | 98% (1H NMR) |
| Synonyms | BTR-Cl |
| Chemical formula | C102H126Cl2N2O2S14 |
| Molecular weight | 1931.97 g/mol |
| CAS number | 2410661-17-3 |
| HOMO / LUMO | HOMO = -5.46 eV LUMO = -3.70 eV [1] |
| Melting point (DSC) | 226°C, 195°C (Tg) |
| Absorption | λmax 580 nm, 624 nm in film |
| Color/form | Dark purple powder/crystals |
| Solubility/processing solvents | Chloroform, chlorobenzene |
| Classification / Family | Benzodithiophene (BDT) derivatives, Heterocyclic five-membered ring, Organic semiconducting materials, Organic Photovoltaics, Small molecule donor, SM-OPVs, Liquid crystal |
Chemical Structure
MSDS Documentation
BTR-Cl MSDS sheetPricing
| Batch | Quantity | Price |
| M2257A1 | 100 mg | £480 |
| M2257A1 | 250 mg | £950 |
| M2257A1 | 500 mg | £1800 |
| M2257A1 | 1 g | £3200 |
| M2257A1 | 5 - 10 g* | Please enquire |
Literature and Reviews
- All-Small-Molecule Organic Solar Cells with an Ordered Liquid Crystalline Donor, H. Chen et al., Joule 3, 3034–3047 (2019); DOI: 10.1016/j.joule.2019.09.009.
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Delicate Morphology Control Triggers 14.7% Efficiency All-Small-Molecule Organic Solar Cells, H Tang et al., Adv. Energy Mater., 2001076 (2020); DOI: 10.1002/aenm.202001076.
- 15.34% Efficiency All-Small-Molecule Organic Solar Cells with Improved Fill Factor Enabled by a Fullerene Additive, D. Hu et al., Energy Environ. Sci., 13, 2134-2141 (2020); DOI: 10.1039/D0EE00714E.
- A molecular nematic liquid crystalline material for high-performance organic photovoltaics, K. Sun et al., Nat. Commun., 6:6013 (2014); DOI: 10.1038/ncomms7013.
To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, pharmaceuticals, cosmetics, food or commercial applications.