摘要
光生电流是太阳电池电流方程中的一个关键数值,但在单原点坐标系中无法进行标示,因此设计了双原点坐标系.在双原点坐标系中,通过对基尔霍夫电流定律如何进行标示的讨论,实现了太阳电池等效电路中各电流项和电压项的标示.双原点坐标系清晰地指出:光生电流与短路电流之差随短路电流增大而增大,只有在低光照下光生电流与短路电流才大致相当,在高光照下两者差异不可忽略;太阳电池输出功率与内耗功率在光生电流总功率中的占比随光生电流会发生改变,若要求输出功率大于内耗功率,则太阳电池不宜工作在高光照下.双原点坐标系为太阳电池的研究提供了一个适配的坐标系.
Photo-generated current is important in solar cell current equation. The value of photo-generated current cannot be labeled in the conventional single origin coordinate system, and a novel dual-origin coordinate system is designed.This article provides a process in how to mark the Kirchhoff＇s law in a dual-origin coordinate system; besides, the current items（photo-generated current, diode current, shunt resistance current） and the voltage items（diode voltage,series resistance voltage） are also shown. A dual-origin coordinate system clearly points out that the difference between photo-generated current and short-circuit current will increase with increasing short-circuit current. This difference can be ignored only in low light, but it must be considered in high light. The proportions of output power and internal friction power may change with photo-generated current. Assuming that the output power is greater than the internal friction power, the solar cell should not be used to work under high light. A dual-origin coordinate system can provide an adaptation for solar cell study.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第11期401-406,共6页
Acta Physica Sinica
关键词
双原点坐标系
太阳电池
基尔霍夫电流定律
内耗功率
dual-origin coordinate system
solar cell
Kirchhoff＇s law
internal friction power
