Fully-printed, all-polymer, bendable and highly transparent complementary logic circuits

• Fully all-printed complementary transistors are fabricated on plastic and in ambient conditions.
• Only synthetic carbon-based materials are adopted, thus favoring in perspective the recycling.
• A low contact resistance of 33 kΩ cm is obtained for n-type devices with printed polymer electrodes.
• Ring oscillators and D-Latches are fabricated by integrating logic stages with a delay down to 30 μs.
• Our all-printed circuits combine bendability and high transparency.

In this contribution we show a simple approach for the development of all-polymer based complementary logic circuits fabricated by printing on plastic, at low temperature and in ambient conditions. This is achieved by patterning, with a bottom-up approach, solely synthetic carbon-based materials, thus incorporating earth-abundant elements and enabling in perspective the recycling – a critical aspect for low-cost, disposable electronics. Though very simple, the approach leads to logic stages with a delay down to 30 μs, the shortest reported to date for all-polymer circuits, where each single component has been printed. Moreover, our circuits combine bendability and high transparency, favoring the adoption in several innovative applications for portable and wearable large-area electronics.

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