Thermal and non-thermal equilibrium processes of charge extraction in accumulated charge measurement (ACM)

2021 ◽  
Vol 130 (19) ◽  
pp. 195501
Author(s):  
Hiroyuki Tajima ◽  
Tomofumi Kadoya ◽  
Koji Yamaguchi ◽  
Yuichi Omura ◽  
Takeshi Oda ◽  
...  
Keyword(s):  
Thermal Equilibrium ◽  
Charge Measurement ◽  
Equilibrium Processes ◽  
Charge Extraction

Thermal-equilibrium processes in undoped amorphous-silicon alloys

1987 ◽  
Vol 36 (17) ◽  
pp. 9348-9350 ◽  
Author(s):  
S. C. Agarwal ◽  
J. S. Payson ◽  
S. Guha
Keyword(s):  
Amorphous Silicon ◽  
Thermal Equilibrium ◽  
Silicon Alloys ◽  
Equilibrium Processes

Thermal Equilibrium Processes in a-Si:H Solar Cells

1995 ◽  
Vol 377 ◽  
Author(s):  
Jae-Hee Lee ◽  
Jae-Seog Koh ◽  
Jin Jang
Keyword(s):  
Solar Cells ◽  
Thermal Equilibrium ◽  
Short Circuit ◽  
Chemical Vapor ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Internal Electric Field ◽  
Equilibrium Processes ◽  
Current Voltage ◽  
Before And After

ABSTRACTHydrogenated amorphous silicon (a-Si:H) solar cells are prepared by plasma enhanced chemical vapor deposition (PECVD). Before quenching the solar cells, the short circuit current (Jsc), open circuit voltage (Voc), fill factor (F. F.) and conversion efficiency (η) are 17.79 mA/cm2, 0.79 V, 53.29, and 7.49 %, respectively. After thermal quenchine the solar cells from 200°C, Jsc, Voc, F. F., and η are 18.64 mA/cm2, 0.8 V, 53.79, and 8.02 %, respectively. We investigated the thermal equilibrium processes of each P, I, and N layers. Also, we obtained the dark current-voltage characteristics of a-Si:H solar cells before and after quenching. We analyze the results in terms of the change of the internal electric field in a-Si:H solar cells, caused by the shift of the Fermi level of P layer toward valence band.

Thermal-equilibrium processes in amorphous silicon

1987 ◽  
Vol 35 (3) ◽  
pp. 1316-1333 ◽  
Author(s):  
R. Street ◽  
J. Kakalios ◽  
C. Tsai ◽  
T. Hayes
Keyword(s):  
Amorphous Silicon ◽  
Thermal Equilibrium ◽  
Equilibrium Processes

A theoretical investigation of radiation mechanisms of insect chemoreception

1974 ◽  
Vol 185 (1078) ◽  
pp. 33-49 ◽  
Keyword(s):  
Theoretical Investigation ◽  
Thermal Equilibrium ◽  
Background Radiation ◽  
Living Organism ◽  
General Mechanism ◽  
Radiation Mechanisms ◽  
Radiative Processes ◽  
Equilibrium Processes ◽  
Special Cases ◽  
Non Equilibrium

A theoretical investigation is performed of the hypothesis that certain insect sensory receptors operate by modal radiation mechanisms, i. e. as dielectric waveguide or resonator aerials, at infrared wavelengths, in the process of chemoreception and temperature measure­ment. The basic physical principles, requirements, and limitations of such mechanisms are discussed. The criterion chosen for the detectability of radiation emitted (absorbed) by stimulus molecules is that the increment (decrement) in signal power be greater than that from fluctua­tions in the background power from sky and ground. Thermal equilibrium processes . Mechanisms involving the emission of characteristic wave­lengths of radiation by vibrationally or rotationally excited odorant molecules in thermal equilibrium with their surroundings, or involving the absorption of characteristic wavelengths of background radiation by odorant molecules in the ground state, are analysed. For both emission and absorption mechanisms, required concentrations of odorant molecules are much greater than observed sensitivity thresholds for pheromones and most scents. There are also severe limitations on the discriminatory ability of any singly innervated sensillum. Non-equilibrium processes . Detection of stimulated or spontaneous emission of infrared radiation from low concentrations of odorant molecules released in excited states by a living organism is extremely difficult. Even for wavelengths in the 3 to 4μm atmospheric window the advantages of non-equilibrium processes are cancelled by the effects of collisions and other factors. However, radiation from fires is readily detectable, by day or night, in the 3 to 4μm window. Triggering of acceptors by non-radiative processes, in which specificity is determined principally by infrared spectrum, is theoretically possible and merits further investigation. Thus radiation mechanisms cannot provide a general mechanism of chemoreception, and in particular cannot account for pheromone detection, but might only operate in rare special cases, for which critical experiments are proposed. A theoretical model of operation of the honeybee pit-organs as dielectric resonators has been constructed as an illustrative example for the analysis.

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