Introduction: Historical and Concepts

Who invented the first synthetic polymer, Bakelite?

• Alan J. Heeger

• Leo Baekeland

• Charles Kittel

• Hideki Shirakawa

What year was the first electrically conductive polymer discovered?

• 1947

• 1963

• 1977

• 2000

What is the main difference between MDP and MDC?

• MDCs are toxic while MDPs are non-toxic.

• MDCs are more widely used in xerography than MDPs.

• MDPs are doped polymers; MDCs are doped crystals.

• MDCs have better photoconductivity than MDPs.

Which scientist developed the vacuum diode in 1905?

• J.C. Bose

• Alan Turing

• Ambrose Fleming

• Jagadish Bose

What does the Schrödinger equation fundamentally describe?

• The temperature of solids

• The behavior of wave diffraction

• The energy of a quantum system

• The structure of polymers

Why can't classical mechanics be used to describe electron behavior in atoms?

• Electrons don't exist in classical physics

• Electrons have infinite mass

• Electron behavior at small scales involves probability

• Classical mechanics is inaccurate at high temperatures

What does the principal quantum number n determine?

• Angular momentum

• Magnetic orientation

• Energy level

• Orbital shape

Why do molecular crystals have limited application in devices?

• They are too conductive

• They require thick films and high voltages

• They are amorphous

• They cannot form excitons

What key benefit did thin film development bring to organic electronics?

• Higher toxicity

• Higher voltage operation

• Low-voltage operation

• Easier glass encapsulation

Which material property causes energy bands in solids?

• Atomic mass

• Crystal symmetry

• Orbital splitting due to many atoms

• External temperature