恶劣环境（沙特阿拉伯红海海滩），异质结太阳电池可靠性研究

恶劣环境下硅异质结太阳电池可靠性研究： 以沙特阿拉伯红海海滩为例 刘文柱 第十六 届中国太阳级硅及光伏发电 研讨会 江苏无锡， 2020年 11月 4-6日 Outline  Motivation  Tailoring a-Si:H film  DH stability of passivation  Stability Strategies for SHJ solar cells  Conclusion Motivation How to achieve high efficient SHJ solar cells? How to make stable SHJ solar cell in real environment? 24% Mass production Tailoring a-Si:H film Microstructure of i-a-Si:H can be substantially changed by means of PECVD Tailoring a-Si:H film Si-H clusters in large voids dominate the optical bandgap Tailoring a-Si:H film Combining IR and ellipsometry, we confirm the Eg is indeed controlled by the clustered Si-H, rather than isolated si-H Jsc Tailoring a-Si:H film Sample A Sample B Diff. (eV) Eg (eV) 1.59 1.85 0.26  (eV) 4.33 4.48 0.15 Short bonds retreat the VBM, how to affect the carrier transport? Tailoring a-Si:H film Theoretically, it does not block electron transport. Tailoring a-Si:H film However, when reducing the [H2]/[SiH4] (or enlarging the Eg) to extremity, the bulk conductivity probably limit the performance of SHJ solar cells FF Tailoring a-Si:H film Large Eg seems benefit to Jsc and Voc, and has no influence on FF. Voc Tailoring a-Si:H film Trade-off 1.85 eV DH stability of passivation Porous a-Si:H degrades faster in DH environment Stability Strategies for SHJ solar cells An optimized plasma condition is another strategy! a-Si:H Stability Strategies for SHJ solar cells Dielectrics Dielectric protection Holding 98% of initial PCE Conclusions There exists a trade-off between Jsc, Voc and FF, with respect to a-Si:H film Strategy 1: Making the a-Si:H itself more stable Strategy 2: Protecting the a-Si:H by dielectrics 参考文献： Wenzhu Liu, et. al, Damp-heat-stable silicon heterojunction solar cells for mass Production, Joule 4, 1–15, April 15, 2020 Acknowledgments 张丽平 博士 石建华 博士 杨新波 博士 （苏州大学） 俞健 博士 （西南石油大学） 康静轩 （莱布尼茨 paul-drude-institute） 彭军 博士 （ ANU） 延玲玲 （南开大学） 许路加 博士 （ KAUST） 吴卓鹏 陈仁芳博士 王凯 博士 （西北工业大学） Stefaan De Wolf (KAUST) 孟凡英 研究员 刘正新 研究员