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A Sustainable Approach to Flexible Electronics with Zinc-Tin Oxide Thin-Film Tr...
Fernandes, Cristina; Santa, Ana; Santos, Ângelo; Bahubalindruni, Pydi; Deuermeier, Jonas; Martins, Rodrigo; Fortunato, Elvira; Barquinha, PedroZinc-tin oxide (ZTO) is widely invoked as a promising indium and gallium-free alternative for amorphous oxide semiconductor based thin-film transistors (TFTs). The main bottleneck of this semiconductor material compared to mainstream indium-gallium-zinc oxide (IGZO) is centered in the larger processing temperatures required to achieve acceptable performance (>300 °C), not compatible with low-cost flexible subst...
Papertronics: Multigate paper transistor for multifunction applications
Martins, Rodrigo; Gaspar, Diana; Mendes, Manuel J.; Pereira, Luis; Martins, Jorge; Bahubalindruni, Pydi; Barquinha, Pedro; Fortunato, ElviraThe use of disposable recyclable, eco-friendly, sustainable and low-cost devices with multiple functions is becoming a demand in the emerging area of the Internet of Things as a way to decrease the degree of complexity of the electronic circuits required to serve a plethora of applications. Moreover, for low-cost disposable applications, it is relevant the systems to be recyclable. The idea beyond the present s...
Planar Dual-Gate Paper/Oxide Field Effect Transistors as Universal Logic Gates
Gaspar, Diana; Martins, Jorge; Bahubalindruni, Pydi; Pereira, Luís; Fortunato, Elvira; Martins, Rodrigoproject PapEl, reference PTDC/CTM-NAN/5172/2014. PD/BD/52627/2014. SFRH/BD/122286/2016.; Electronics on paper enable some specific applications out of conventional ones which require innovative approaches and concepts on the design of devices and systems. Within this context, this work demonstrates that a unique set of characteristics can be combined in planar dual-gate oxide–based field effect transistors with...
A Voltage Controlled Oscillator Using IGZO Thin-Film Transistors
Keragodu, Tejaswini; Tiwari, Bhawna; Nishtha; Bahubalindruni, Pydi; Goes, Joao; Barquinha, Pedroearly career research grant with project ref. ECR/2017/000931. National Funds through FCT - Portuguese Foundation for Science and Technology POCI-01-0145-FEDER-007688; This paper presents a voltage controlled oscillator (VCO) using amorphous Indium Gallium Zinc Oxide (a-IGZO) thin-film transistors (TFTs). This circuit consists of a high-gain OpAmp, a comparator and a relaxation oscillator. The implemented relax...
A Low-Power Rail-to-Rail Row/Column Selector Operating at 2V Using a-IGZO TFTs ...
Santos, Ângelo; Tiwari, Bhawna; Martins, Jorge; Santa, Ana; Chapagai, Kamal; Bahubalindruni, Pydi; Barquinha, PedroECR/2017/000931 POCI-01-0145-FEDER-007688 SFRH/BD/122286/2016 ORABAC/17852; This paper presents design and implementation of 8-bit shift register with low-voltage amorphous Indium Gallium Zinc Oxide (a-IGZO) thin-film transistors (TFTs) for row/column selection of pixel matrix in flexible displays. This circuit is capable of ensuring complete rail-to-rail operation by employing novel NAND gates that were develo...
A Comparitive Study of On-Chip Clock Generators Using a-IGZO TFTs for Flexible ...
Wadhwa, Nishtha; Martins, Jorge; Bahubalindruni, Pydi; Deb, Sujay; Barquinha, PedroECR/2017/000931. POCI-01-0145-FEDER-007688. No. 692373 (BET-EU). SFRH/BD/122286/2016.; This paper presents a comparitive study of ring oscillators (RO) using amorphous Indium Gallium Zinc Oxide (a-IGZO) thin-film transistors (TFTs) to implement on-chip clock generator for flexible electronic systems. A five-stage RO has been implemented with different inverter topologies using IGZO TFTs, which includes Diode co...