Absorption current refers to the flow of electrical current through a material or device when it is exposed to a certain level of light. There are several synonyms for absorption current that are commonly used in scientific literature. Some of these include photoelectric current, photocurrent, and photoconductivity. Additionally, optoelectronic current, optocurrent, and photovoltaic current are some other terms that are used interchangeably with absorption current. Each of these terms refers to the same basic phenomenon of electrical conduction resulting from the absorption of light. Regardless of the terminology used, absorption current plays an essential role in the functioning of many modern technologies, such as solar cells and photodiodes.