Sökning: "ambient fabrication"

Visar resultat 1 - 5 av 31 avhandlingar innehållade orden ambient fabrication.

1. 1. Design and Fabrication of Light-Emitting Electrochemical Cells

   Författare :Andreas Sandström; Ludvig Edman; Ronald Österbacka; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Light-emitting electrochemical cell; fabrication; organic semiconductors; organic electronics; ambient fabrication; roll-to-roll; fysik; Physics;

   Sammanfattning : Glödlampan, en gång symbolen för mänsklig uppfinningsförmåga, är idag på väg att försvinna. Lysdioder och lågenergilampor har istället tagit över då dessa har betydligt längre livstid och högre effektivitet. LÄS MER

3. 2. Functional and Flexible Light-Emitting Electrochemical Cells

   Författare :Amir Asadpoordarvish; Ludvig Edman; Jun Gao; Umeå universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; all-ambient fabrication; ambient-air lifetime; encapsulation; flexible; light-emitting electrochemical cells; light-emitting paper; fysik; Physics;

   Sammanfattning : The introduction of artificial illumination has brought extensive benefits to mankind, and during the last years we have seen a tremendous progress in this field with the introduction of the energy-efficient light-emitting diode (LED) and the high-contrast organic LED display. These high-end technologies are, however, produced using costly and complex processes, and it is anticipated that the next big thing in the field will be the advent of a low-cost and “green” illumination technology, which can be fabricated in a cost- and material-efficient manner using non-toxic and abundant raw materials, and which features attractive form factors such as flexibility, robustness and light-weight. LÄS MER

4. 3. Autonomous Lab-on-a-chip: solutions and fast prototyping tools

   Författare :German Comina Bellido; Daniel Filippini; Edwin Jager; Anke Suska; Niels B. Larsen; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Autonomous Lab-on-a-chip; bio-chemical sensing; sensor fabrication; biosensing cell phone; 3D printed fluidics; 3D printed optics.;

   Sammanfattning : In this thesis, solutions for the development of autonomous Lab-on-a-chip (LOC), and 3D printing for fast prototyping of LOC devices are investigated. Lab-on-a-chip devices integrate analytical systems and conditioning processes in a compact package. LÄS MER

5. 4. Fabrication and Characterization of Silicon Carbide Power Bipolar Junction Transistors

   Författare :Hyung-Seok Lee; Carl-Mikael Zetterling; Tat-Sing Chow; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; silicon carbide; power device; BJT; current gain; specific on resistance RSP_ON ; breakdown voltage; forward voltage drop; surface recombination; ohmic contact.; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

   Sammanfattning : Silicon carbide bipolar junction transistors (BJTs) are attractive power switching devices because of the unique material properties of SiC with high breakdown electric field, high thermal conductivity and high saturated drift velocity of electrons. The SiC BJT has potential for very low specific on-resistances and this together with high temperature operation makes it very suitable for applications with high power densities. LÄS MER

7. 5. Fabrication Technology for Efficient High Power Silicon Carbide Bipolar Junction Transistors

   Författare :Reza Ghandi; Martin Domeij; Anant Agarwal; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik; Other engineering physics; Övrig teknisk fysik;

   Sammanfattning : The superior characteristics of Silicon Carbide as a wide band gap semiconductor have motivated many industrial and non-industrial research groups to consider SiC for the next generations of high power semiconductor devices. The SiC Bipolar Junction Transistor (BJT) is one candidate for high power applications due to its low on-state power loss and fast switching capability. LÄS MER