[Chongqing Guangdong education] organic electronics (Bilingual) reference materials of Nanjing University of Posts and Telecommunications

education
- Organic electronics （ Bilingual ）- Chapter materials, examination materials - Nanjing University of Posts and telecommunications 【】
Quiz-I
1、【 Judgment questions 】Organic molecule can contain metal atom.
A、 correct
B、 error
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2、【 Judgment questions 】There are some differences in opto-electronics processes between organic and inorganic materials.
A、 correct
B、 error
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3、【 Judgment questions 】There is only one kind of exciton.
A、 correct
B、 error
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4、【 Judgment questions 】All organic materials have small conductivity, i.e., they are insulators.
A、 correct
B、 error
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5、【 Judgment questions 】Conventional electronics is based on inorganic semiconductors.
A、 correct
B、 error
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6、【 Judgment questions 】In organic materials there are no covalent bondings.
A、 correct
B、 error
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7、【 Judgment questions 】Compared to covalent bonding forces in inorganic semiconductors, the van de Waals forces in organic materials are nearly ten times smaller.
A、 correct
B、 error
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8、【 Judgment questions 】Conjugation is an essential structure in photoelectronically active organic materials.
A、 correct
B、 error
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9、【 Judgment questions 】Excitons in organic materials are Wannier type with long radius.
A、 correct
B、 error
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10、【 Judgment questions 】The transport mode of carrier in organic materials is mainly hopping with low mobility.
A、 correct
B、 error
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Quiz-II
1、【 Judgment questions 】Conjugation size of organic molecular partially determined the carrier transportation property.
A、 correct
B、 error
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2、【 Judgment questions 】Covalent bonding can also exist in inorganic materials.
A、 correct
B、 error
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3、【 Judgment questions 】σ electron can easily delocalize.
A、 correct
B、 error
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4、【 Judgment questions 】An ionic crystal consists of cations and anions, therefore, the ionic crystal can conduct electricity.
A、 correct
B、 error
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5、【 Judgment questions 】If there is only one covalent bond between two atoms, it is σ bond.
A、 correct
B、 error
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6、【 Judgment questions 】Hydrogen bonding belongs to permanent dipole-dipole interaction, it is one of the van der Waals interaction
A、 correct
B、 error
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7、【 Judgment questions 】Stable molecular stacking requires minimized lattice energy
A、 correct
B、 error
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8、【 Judgment questions 】Compared to Debye force, London force is more polarisability-dependent
A、 correct
B、 error
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9、【 Judgment questions 】Atomic orbital describes orbital energy only.
A、 correct
B、 error
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10、【 Judgment questions 】Generally, π electron shows higher energy than that of σ electron, so π* electron also shows higher energy than that of σ* electron.
A、 correct
B、 error
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Q3
1、【 Judgment questions 】HOMO and LUMO concept can be used for all isolated organic or inorganic molecules.
A、 correct
B、 error
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2、【 Judgment questions 】Ionization potential determines the ability of hole injection to a molecule.
A、 correct
B、 error
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3、【 Judgment questions 】Electron affinity is the ability of molecule to attract electron.
A、 correct
B、 error
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4、【 Judgment questions 】Metal work function is different with Fermi level in number.
A、 correct
B、 error
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5、【 Judgment questions 】Conduction band is fully filled with electrons.
A、 correct
B、 error
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Quiz-IV
1、【 Judgment questions 】Hydrogen bonding belongs to permanent dipole-dipole interaction, it is one of the van der Waals interaction.
A、 correct
B、 error
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2、【 Judgment questions 】Stable molecular stacking requires minimized lattice energy.
A、 correct
B、 error
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3、【 Judgment questions 】Compared to Debye force, London force is more polarisability-dependent.
A、 correct
B、 error
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4、【 Judgment questions 】Organic solids are all in amorphous state.
A、 correct
B、 error
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5、【 Judgment questions 】All organic molecules have permanent dipole.
A、 correct
B、 error
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Quiz-V
1、【 Judgment questions 】In triplet state, the spin directions of the two unpaired electrons are opposite
A、 correct
B、 error
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2、【 Judgment questions 】In the ground state of organic molecules, electrons are generally paired, and the total spin number is zero
A、 correct
B、 error
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3、【 Judgment questions 】Non-radiative decay processes refer to the electron transition from higher energy level to lower energy level without light emission
A、 correct
B、 error
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4、【 Judgment questions 】In an excited organic molecule, the nonradiative decay processes always exist
A、 correct
B、 error
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5、【 Judgment questions 】An internal conversion process can not occur between two different electronic levels
A、 correct
B、 error
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6、【 Judgment questions 】The rate of internal conversion is faster than the radiative decay process
A、 correct
B、 error
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7、【 Judgment questions 】Internal conversion can occur within the same electronic level, as well as different electronic levels
A、 correct
B、 error
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8、【 Judgment questions 】Generally, inter system crossing (ISC) is forbidden, spin-orbital coupling can release the forbidden feature
A、 correct
B、 error
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9、【 Judgment questions 】Spin-orbital coupling renders triplet state lost its feature and exhibiting some singlet characteristic, which can promote inter system crossing (ISC) and phosphorescent emission
A、 correct
B、 error
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10、【 Judgment questions 】Compared to pure organic materials, metal complexes generally exhibit more strong spin-orbital coupling, as well as more strong phosphorescence
A、 correct
B、 error
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Quiz-VI
1、【 Judgment questions 】The Franck-Condon factor is related to the equilibrium position of the two vibrational stats. The larger the value, the more the overlap, and the stronger the transition.
A、 correct
B、 error
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2、【 Judgment questions 】Franck-Condon shift is a Stokes shift caused by molecular conformation shift
A、 correct
B、 error
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3、【 Judgment questions 】According to Franck-Condon principle, and if the environmental influence to the two states is small, the absorption and the emission spectra will be mirror symmetry
A、 correct
B、 error
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4、【 Judgment questions 】In spectra of optical absorption or emission, the rotational energy some time is observable as fine structure
A、 correct
B、 error
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5、【 Judgment questions 】Dipole allowed optical transition occurs between two electronic state with same symmetry
A、 correct
B、 error
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Quiz-VII
1、【 Judgment questions 】Compared to monomer emission, the excimer emission is redshift, structureless, but short lifetime.
A、 correct
B、 error
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2、【 Judgment questions 】There is no ground state for excimer, but exists ground state for exciplex.
A、 correct
B、 error
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3、【 Judgment questions 】Electric field generally assists the dissociation of exciplex.
A、 correct
B、 error
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4、【 Judgment questions 】Excimer is formed by two different molecules
A、 correct
B、 error
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5、【 Judgment questions 】Dimer is formed by two same molecules
A、 correct
B、 error
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6、【 Judgment questions 】Compared to photoluminescence from dilute solution of a pure organic material, the photoluminescence from the solid state of this pure material decreases dramatically with very large redshift. This is due to exciplex formation.
A、 correct
B、 error
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Quiz-VIII
1、【 Judgment questions 】Under optical excitation only singlet exciton exists.
A、 correct
B、 error
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2、【 Judgment questions 】Dexter energy transfer is a resonance energy transfer by dipole interaction between the donor molecule and the acceptor molecule.
A、 correct
B、 error
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3、【 Judgment questions 】Frenkel exciton has the smallest radius.
A、 correct
B、 error
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4、【 Judgment questions 】Wannier exciton is generally found in inorganic semiconductors.
A、 correct
B、 error
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Quiz-IX
1、【 Judgment questions 】When we say that anthracene is a photoconductor, it means that the conductivity of this material is higher at irradiation with energy larger than its bandgap, compared to dark current.
A、 correct
B、 error
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2、【 Judgment questions 】To evaluate the conductivity of a material, the only micro factor is carrier mobility.
A、 correct
B、 error
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3、【 Judgment questions 】Both producing external photoelectric effect and photoluminescence need light irradiation. And the light energy is much higher in the latter case.
A、 correct
B、 error
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4、【 Judgment questions 】Organic material system can be conductor, semiconductor, insulator, even superconductor.
A、 correct
B、 error
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5、【 Judgment questions 】Generally speaking in an organic material, the average energy of a hole is approximately equal to the energy of HOMO electron
A、 correct
B、 error
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6、【 Judgment questions 】When dopant with valence electrons less than those in the host semiconductor is introduced, the resulting doped system is n-type semiconductor.
A、 correct
B、 error
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