Impact estimation of average photon energy from two spectrum bands on short circuit current of photovoltaic modules

En considérant les variations dimensionnelles de la tension photovoltaïque induite en circuit ouvert par des rayonnements lumineux d'énergie supérieure à 3,66 eV dans des structures sandwich Al/ZnS/Au, ainsi que les variations avec le flux lumineux du courant de court-circuit et de la conductance correspondant à la phototransition entre bandes, l'hypothèse d'une quasi-bande de conduction créée par l'ionisation de centres coulombiens est avancée. Elle conduit à une formulation de la tension photovoltaïque en bonne cohérence avec l'expérience.Variations with thickness of open-circuit voltage, short-circuit current and photoconductance associated to interband transition lead to postulate the existence of a quasi-conduction band, associated with ionized coulombic centres, in Al/ZnS/Au illuminated (photon energy > 3,66 eV) sandwich structures. An expression of open-circuit voltage is deduced, in good agreement with experimental data.

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Research on the potential-induced degradation (PID) of PV modules running in two typical climate regions

Clean Energy ◽

10.1093/ce/zkz007 ◽

2019 ◽

Vol 3 (3) ◽

pp. 222-226

Author(s):

Gang Sun ◽

Xiaohe Tu ◽

Rui Wang

Keyword(s):

Degradation Mechanism ◽

Short Circuit ◽

Short Circuit Current ◽

Open Circuit ◽

Climatic Conditions ◽

Photovoltaic Modules ◽

Significant Potential ◽

Significant Difference ◽

Pv Modules ◽

Different Types

Abstract In order to accurately select photovoltaic modules under different climatic conditions, three kinds of polycrystalline silicon photovoltaic modules were prepared for this study using different properties of packaging materials and two typical climatic zones of China were selected for installation and operation of these photovoltaic (PV) modules. The photoelectric parameters (maximum power, open-circuit voltage, short-circuit current, etc.) and electroluminescence images of these modules were analysed before and after their operation for 6 months. The study found that the performance of PV modules in different climatic regions shows different decay tendency and degradation mechanism. There was a significant difference in the degradation of the three different types of PV modules in the sub-humid-hot region (Suzhou, Jiangsu); two kinds of photovoltaic modules using relatively poorly performing package materials showed significant potential-induced degradation effects. However, the degradation trend of the three different types of PV modules in the warm-temperate region (Kenli, Shandong) was consistent and no significant potential-induced degradation effect was observed.

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A new model to evaluate solar spectrum impacts on the short circuit current of solar photovoltaic modules

Energy ◽

10.1016/j.energy.2018.12.003 ◽

2019 ◽

Vol 169 ◽

pp. 29-37 ◽

Cited By ~ 3

Author(s):

Jinqing Peng ◽

Lin Lu ◽

Meng Wang

Keyword(s):

Short Circuit ◽

Solar Spectrum ◽

Short Circuit Current ◽

Solar Photovoltaic ◽

New Model ◽

Photovoltaic Modules

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Uniqueness verification of solar spectrum index of average photon energy for evaluating outdoor performance of photovoltaic modules

Solar Energy ◽

10.1016/j.solener.2009.03.004 ◽

2009 ◽

Vol 83 (8) ◽

pp. 1294-1299 ◽

Cited By ~ 67

Author(s):

Takashi Minemoto ◽

Yasuhito Nakada ◽

Hiroaki Takahashi ◽

Hideyuki Takakura

Keyword(s):

Photon Energy ◽

Solar Spectrum ◽

Photovoltaic Modules ◽

Average Photon Energy

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Reduction in the short-circuit current density of silicon heterojunction photovoltaic modules subjected to potential-induced degradation tests

Solar Energy Materials and Solar Cells ◽

10.1016/j.solmat.2016.12.027 ◽

2017 ◽

Vol 161 ◽

pp. 439-443 ◽

Cited By ~ 18

Author(s):

Seira Yamaguchi ◽

Chizuko Yamamoto ◽

Keisuke Ohdaira ◽

Atsushi Masuda

Keyword(s):

Current Density ◽

Short Circuit ◽

Short Circuit Current ◽

Short Circuit Current Density ◽

Photovoltaic Modules ◽

Degradation Tests

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Design of an Analog Control Circuit for the Automatic Sun-Tracking PV Bracket System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1049-1050.678 ◽

2014 ◽

Vol 1049-1050 ◽

pp. 678-681

Author(s):

Mian Liao ◽

Ling Yun Kong ◽

Hong Liang Ding

Keyword(s):

Solar Cell ◽

Pitch Angle ◽

Short Circuit ◽

Reference Value ◽

Short Circuit Current ◽

Control Circuit ◽

The Sun ◽

Photovoltaic Modules ◽

Analog Control ◽

Sunlight Intensity

This paper designed an analog control circuit which can automatically track the sun for PV bracket system to improve the solar cell photo-electricity conversion efficiency. The sunlight intensity can be real-time detected by sampling the short-circuit current of solar cell. The PV bracket system can be automatically adjusted to achieve a final horizontal angle and pitch angle by using the hysteresis comparator and dedicated motor driver chip, which always makes photovoltaic modules toward the sun's position. At the same time, the PV bracket system can be automatically reset by the hall switch when the sun reaches the sunset and the light intensity is less than the reference value. The experimental prototype is used to testify the correctness and reliability of the control system, which has better practicability and value to extend.

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