Sebastian Mack, Katrin Krieg, Christopher Teßmann, Daniel Ourinson, Jana-Isabelle Polzin, Andreas Wolf
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引用次数: 0
摘要
隧道氧化钝化接触式太阳电池的正面复合通常用钝化区和金属化区复合参数j0e来描述。无铝金属化浆料和电流辅助触点形成的组合显著降低了j0e,met。这种新的金属化方法可以实现更浅的掺杂轮廓和更高的薄片电阻,从而也降低了j0e。在这项研究中,我们提供了如何通过调整大气压BBr3扩散过程中的硼掺杂谱来减少整体正面复合的见解。轮廓中掺杂剂剂量的限制导致所得轮廓的Rsheet较高。在Rsheet = 161 Ω sq−1时,新开发的均匀硼射极的j0e = 14 fA cm−2,比初始值降低了62%,而在Rsheet = 330 Ω sq−1时,确定的j0e = 8 fA cm−2更低。尽管使用了电流辅助接触形成技术,但由于银正面的接触电阻率增加,仍然对银正面膏体构成了挑战。在工业制造的TOPCon太阳能电池中应用替代AgAl浆料可获得24.5%的最高转换效率。
Development of Boron Emitters for Tunnel Oxide Passivated Contact Solar Cells with Current-Assisted Contact Formation
Front side recombination in tunnel oxide passivated contact solar cells is frequently described by the recombination parameters j0e for the passivated and j0e,met for the metallized front region. The combination of Al-free metallization pastes and current-assisted contact formation has shown significant reduction of j0e,met. Such new metallization approaches enable shallower doping profiles and higher sheet resistances Rsheet, which in turn also reduce j0e. In this study, we provide insight into how to reduce the overall front side recombination, by tailoring the boron dopant profile from atmospheric pressure BBr3 diffusion processes. The limitation of the dopant dose in the profile leads to a higher Rsheet of the resulting profile. The newly developed homogeneous boron emitter features j0e = 14 fA cm−2 at a Rsheet = 161 Ω sq−1, a 62% decrease from the initial value, and an even lower j0e = 8 fA cm−2 is determined for an emitter with 330 Ω sq−1. An increased contact resistivity on the front side still poses a challenge for Ag front side pastes despite the use of current-assisted contact formation. Application of an alternative AgAl paste in industrial-type fabricated TOPCon solar cells results in a maximum conversion efficiency of 24.5%.
Solar RRLPhysics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
12.10
自引率
6.30%
发文量
460
期刊介绍:
Solar RRL, formerly known as Rapid Research Letters, has evolved to embrace a broader and more encompassing format. We publish Research Articles and Reviews covering all facets of solar energy conversion. This includes, but is not limited to, photovoltaics and solar cells (both established and emerging systems), as well as the development, characterization, and optimization of materials and devices. Additionally, we cover topics such as photovoltaic modules and systems, their installation and deployment, photocatalysis, solar fuels, photothermal and photoelectrochemical solar energy conversion, energy distribution, grid issues, and other relevant aspects. Join us in exploring the latest advancements in solar energy conversion research.