Systems and methods for evaluating bifacial solar cells and their emitter quantum efficiencies

Abstract

The invention discloses a system and method for estimating quantum efficiency of a double-sided solar cell and an emitter thereof, and relates to the technical field of a solar cell device and method.The system comprises a xenon flash lamp, a filtering wheel, a light attenuation piece, a solar cell to be tested, a standard silicon detector, a standard test circuit, an inductor coupling circuit, signal acquisition equipment and a PC. An electrical parameter of a front surface and a short-circuit current of a rear surface of the double-sided solar cell are tested by employing the standard testcircuit, two new parameters are introduced to processing double-sided performance of the cell, so that the double-sided solar cell is represented under a standard test condition (STC); the minority carrier lifetime under dual wavelengths of a surface of the solar cell is tested by employing the inductor coupling circuit according to a quasi-steady-state photoelectric technology, and the representation of the solar cell emitter is achieved to obtain the quantum absorption efficiency; and the system and the method have the characteristics of rapid and accurate test, simple and compact structure,multiple functions and real-time on-line detection.

Description

technical field [0001] The invention relates to the technical field of solar cell testing devices and methods, in particular to a system and method for evaluating double-sided solar cells and their emitter quantum efficiency. Background technique [0002] Bifacial solar cells have been studied since the 1960s. The use of bifacial solar cells for solar power reduces the cost of electricity generation because this type of solar cell converts incoming sunlight into electricity on both sides of the cell. Experiments have demonstrated a 50% increase in power generation from bifacial modules by collecting reflected radiation from the roof and the surrounding environment. Therefore, bifacial solar cells can not only increase the power density but also reduce the area cost of photovoltaic (PV) power systems. [0003] In order to evaluate the outdoor performance of any photovoltaic device, appropriate characterization methods are required at the cell and module level. For solar ce...

AI Technical Summary

Problems solved by technology

In contrast, traditional quantum efficiency measuring instruments have a built-in monophotometer for measurement. Not only are the measurement speeds slow, but they also require finished devices and relatively complex experimental setups

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