π-Extended Thiazole-Containing Polymer Semiconductor for Balanced Charge-Carrier Mobilities

Area of Science:

• Materials Science
• Organic Electronics
• Polymer Chemistry

Background:

• Semiconducting polymers are crucial for flexible electronic devices.
• Developing materials with balanced charge transport is essential for high-performance organic electronics.
• Acceptor-donor-acceptor (A-D-A) architectures are effective for tuning polymer properties.

Purpose of the Study:

• To design and synthesize a novel low-band gap semiconducting polymer.
• To incorporate a π-extended thiazole-vinylene-thiazole unit into an A-D-A polymer backbone.
• To evaluate the charge transport properties of the new copolymer for potential electronic applications.

Main Methods:

• Synthesis of a novel diketopyrrolopyrrole copolymer incorporating a thiazole-vinylene-thiazole unit.
• Characterization of the polymer's optical and electronic properties.
• Measurement of hole and electron mobilities using device fabrication and testing.

Main Results:

• The synthesized copolymer possesses a low band gap and an A-D-A structure.
• The polymer exhibits well-balanced ambipolar charge transport characteristics.
• High hole mobility (up to 0.11 cm² V⁻¹ s⁻¹) and electron mobility (up to 0.30 cm² V⁻¹ s⁻¹) were achieved.

Conclusions:

• The novel thiazole-containing diketopyrrolopyrrole copolymer demonstrates excellent ambipolar charge transport.
• The achieved mobilities are suitable for various polymer electronics applications.
• This material represents a promising candidate for future organic electronic devices.