• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Physics, simulation, and photonic engineering of photovoltaic devices II >Carrier Collection Efficiency in Multiple Quantum Well Solar Cells
【24h】

Carrier Collection Efficiency in Multiple Quantum Well Solar Cells

机译：多个量子阱太阳能电池中载流子的收集效率

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The present paper proposes Carrier Collection Efficiency (CCE) as a useful evaluation measure to investigate the carrier transport in quantum well solar cells. CCE is defined as the ratio of the carriers extracted as photocurrent to the total number of the carriers that are photo-excited in the p-n junction area, and can be easily calculated by normalizing the collected current, i.e. the difference between the current under light irradiation and that in the dark, to its saturation value at reverse bias. By measuring CCE as a function of the irradiation wavelength and the applied bias, we can directly and quantitatively evaluate the efficiency of the carrier extraction under operation of the cell, and clarify the underlying problem of the carrier transport. The proposed derivation procedure of CCE is based on the assumption that the saturation of the collected current at reverse bias indicates 100% collection of the photo-excited carriers. We validated this hypothesis by studying the balance between the number of the photo-excited carriers that can be collected at a sufficiently large reverse bias and the number of the photons absorbed in the wells. As a result, the absorption fraction in the MQW region well agreed with the saturated external quantum efficiency as we predicted, indicating CCE defined in this study is an appropriate approximation for the collection efficiency of the carrier generated in the active region of a solar cell device.
机译：本文提出载流子收集效率（CCE）作为一种有用的评估手段，以研究量子阱太阳能电池中的载流子传输。 CCE被定义为作为光电流提取的载流子与在pn结区域中被光激发的载流子的总数之比，​​并且可以通过归一化收集的电流（即光照射下的电流之差）而容易地计算出而在黑暗中，在反向偏置时达到其饱和值。通过测量CCE作为照射波长和所施加偏压的函数，我们可以直接和定量地评估细胞操作下载流子提取的效率，并阐明载流子运输的潜在问题。提出的CCE推导程序是基于这样的假设，即反向偏置时所收集电流的饱和度表示100％收集了光激发载流子。我们通过研究在足够大的反向偏压下可以收集的光激发载流子数量与孔中吸收的光子数量之间的平衡，验证了这一假设。结果，MQW区域中的吸收率与我们预期的饱和外部量子效率非常吻合，这表明本研究中定义的CCE是对太阳能电池器件有源区中产生的载流子的收集效率的适当近似值。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号