An All-Solution-Based Hybrid CMOS-Like Quantum Dot/Carbon Nanotube Inverter

The development of low-cost, flexible electronic devices is subordinated to the advancement in solution-based and low-temperature-processable semiconducting materials, such as colloidal quantum dots (QDs) and single-walled carbon nanotubes (SWCNTs). Here, excellent compatibility of QDs and SWCNTs as a complementary pair of semiconducting materials for fabrication of high-performance complementary metal-oxide-semiconductor (CMOS)-like inverters is demonstrated. The n-type field effect transistors (FETs) based on I⁻ capped PbS QDs (V_th = 0.2 V, on/off = 10⁵, S_S-th = 114 mV dec⁻¹, µ_e = 0.22 cm² V⁻¹ s⁻¹) and the p-type FETs with tailored parameters based on low-density random network of SWCNTs (V_th = −0.2 V, on/off > 10⁵, S_S-th = 63 mV dec⁻¹, µ_h = 0.04 cm² V⁻¹ s⁻¹) are integrated on the same substrate in order to obtain high-performance hybrid inverters. The inverters operate in the sub-1 V range (0.9 V) and have high gain (76 V/V), large maximum-equal-criteria noise margins (80%), and peak power consumption of 3 nW, in combination with low hysteresis (10 mV).

An all-solution-processable hybrid CMOS-like inverter based on PbS quantum dots (n-type) and single-walled carbon nanotubes (p-type) is demonstrated. The inverter operates in the sub-1 V range (0.9 V) and have high gain (76 V/V), large noise margins (80%), low hysteresis (10 mV), and low peak power consumption (3 nW).

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