Controlling Polarity of Organic Bulk Heterojunction Field-Effect Transistors via Solvent Additives
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- Controlling Polarity of Organic Bulk Heterojunction Field-Effect Transistors via Solvent Additives
- Park, Jin Kuen; Walker, Bright; Seo, Jung Hwa
- 1-chloronaphthalene; Bulk heterojunction; Bulk heterojunction (BHJ); Molecular energy levels; Organic bulk heterojunctions; polarity; Small molecules; X-ray photoelectron microscopy
- Issue Date
- AMER CHEMICAL SOC
- ACS APPLIED MATERIALS & INTERFACES, v.5, no.11, pp.4575 - 4580
- The effect of additives such as 1,8-diiodooctane (DIO) and 1-chloronaphthalene (CN) on the electronic structures, charge transport and phase separation of small-molecule-based bulk heterojunction (BHJ) films was investigated. Charge transport properties of the BHJ layers significantly changed via the introduction of additives, even though the molecular energy levels remained unchanged. X-ray photoelectron microscopy (XPM) images show the distribution of each phase of the blend films upon the use of additives. The CN additive, in particular, results in a well-percolated network through the active layer.
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