Photovoltaic Cell Defined: A photovoltaic cell, also known as a solar cell, is defined as a device that converts light into electricity using the photovoltaic effect. Working Principle: The solar cell working principle involves converting light energy into electrical energy by separating light-induced charge carriers within a semiconductor.
The bonding process uses an electrically conductive adhesive (ECA) to connect the cell strips together. The shingled strings are interconnected through a metal ribbon to fabricate a high power and high density photovoltaic module. Therefore, the solar cell should exhibit the electrode structure suitable for dividing and bonding.
Working Principle: The solar cell working principle involves converting light energy into electrical energy by separating light-induced charge carriers within a semiconductor. Role of Semiconductors: Semiconductors like silicon are crucial because their properties can be modified to create free electrons or holes that carry electric current.
The GaAs and In 0.5 Ga 0.5 As photovoltaic layers were epitaxially grown on GaAs and InP substrates, respectively. Then, the upper GaAs subcell and the lower In 0.5 Ga 0.5 As subcell with an InP window layer atop were bonded to each other, followed by the removal of the GaAs substrate by chemical etching.
Therefore, the solar cell should exhibit the electrode structure suitable for dividing and bonding. A string created by a dividing and bonding technique corresponds to a busbar-less structure since the divided solar cell overlaps the bus bars.
Instead, it is free to move inside the silicon structure. A solar cell consists of a layer of p-type silicon placed next to a layer of n-type silicon (Fig. 1). In the n-type layer, there is an excess of electrons, and in the p-type layer, there is an excess of positively charged holes (which are vacancies due to the lack of valence electrons).