학술논문

III- V/Si Tandem Cells Utilizing Interdigitated Back Contact Si Cells and Varying Terminal Configurations
Document Type
Conference
Source
2017 IEEE 44th Photovoltaic Specialist Conference (PVSC) Photovoltaic Specialist Conference (PVSC), 2017 IEEE 44th. :3371-3375 Jun, 2017
Subject
Aerospace
Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
Engineering Profession
Fields, Waves and Electromagnetics
Photonics and Electrooptics
Power, Energy and Industry Applications
Silicon
Indium tin oxide
Glass
II-VI semiconductor materials
Zinc compounds
Optical reflection
Language
Abstract
Integrating wide-bandgap III- V with Si solar cells has been shown to yield higher efficiencies than Si alone: As also presented at this conference, four-terminal efficiencies exceeding 32 % have been attained. In this contribution, independent and electrically connected operation of the subcells in such tandem cells is examined. The optics of the tandem cell change significantly if a conducting interconnect, rather than an insulating glass slide, is required between the subcells. These effects are studied, and optically optimized structures for different types of tandem cell operation are presented. It is found that minimizing reflection at the conductive interface between the two cells while maintaining conductivity is the key challenge faced in such devices.