大面积高效硅钙钛矿叠结太阳电池结构与工艺探讨（南昌大学光伏研究院姚凯副教授）

Perovskite/Silicon Tandem Solar Cells ──Challenges and Solutions Dr. Kai Yao Nanchang University yaokai@ncu.edu.cn 31% single junction SQ limit, 43% for two, 50% for three… Prog. Photovolt: Res. Appl., 2011, 19, 286–293. Perovskite ABX3 Low cost and high performance Simple preparation Tunable bandgaps between 1.18 and 2.3 eV Joule 2017, 1, 769–793. ACS Energy Lett. 2017, 2, 2506−2513 Cost Analysis Joule, 2018, 2(8), 1559-1572 1. Types of c-Si bottom cell 2. Light Management 3. Stability Concerns 4. Scale-Up Problem 5. Our Work Features Appl. Phys. Lett. 2015, 106, 121105. Energy Environ. Sci., 2018, 11, 2432--2443 ACS Energy Lett. 2018, 3, 2299-2300 21.8% on 16 cm2 Sci. adv. 2018, 4, eaau9711. PERT Al-BSF PERT PERT Nat. Energy 2017, 2, 17009. Energy Environ. Sci. 2016, 9, 81-88. Adv. Energy Mater. 2017, 8, 1701609. Planar Rear-texturing The development of fully textured monolithic tandems directly compatible with monocrystalline Si industry standards. d) Double-side texturingChristophe Ballif (EPFL) Nat. Mater. 2018, 17, 820−826. 1. nc-Si:H recombination junction; 2. Two-step perovskite process Evaporating + Spin-coating Low-temperature (250 oC) top cell deposition steps have been developed to prevent the degradation of silicon heterojunction bottom cells. * High-Temperature Passivating Contacts ACS Energy Lett. 2019, 4, 844-845. Opt. Express 2016, 24, A1288. The bandgap and thickness of the perovskite absorber has been tuned in coordination with bottom c-Si cell. J. Phys. Chem. Lett. 2019, 10, 3159−3170 Employ Si wafers with only a rear-side texture (and a polished surface for the perovskite top- cell) and to compensate by incorporating light- management textures on the tandem’s front-side. polished surface double-side texture Quantification of the optical impact Energy Environ. Sci., 2018, 11, 3511 Textured Anti-Reflective on the front-side UV Nanoimprint Lithography ACS Energy Lett. 2018, 3, 2173-2180 PDMS AR foil Laminated Polydimethylsiloxane Films Adv. Energy Mater. 2019, 1803241 110 nm (n)nc-SiOx:H (n = 2.6 at 800 nm) sequence of refractive indices in the cell stack Nanocrystalline Silicon Oxide Interlayer Schematically illustrates six representative degradation pathways induced by moisture, heat, and light in regular (n–i–p) architecture PVKSCs. Adv. Mater. 2018, 30, 1800455 Device stability before and after encapsulated Simple encapsulation scheme reduces the degradation rate such that the cell retained 90% of its initial power conversion output after 270 hours under constant illumination at MPP. Impact of perovskite solar cell degradation (1) PCE = 26%, rPSK = 1%. (2) PCE = 28%, rPSK = 2%. (3) PCE = 30%, rPSK = 3%. Sustainable Energy K. Yao, et al. Nano Energy 2017, 40, 155–162; ACS Appl. Mater. Interfaces 2017, 9, 41887-41897 代表工作： Chem. Mater. 2016, 28, 3131−3138; Nano Energy 2015, 18, 165–175; Chem. Commun., 2015, 51, 15430--15433; more works will be published in this year. Perovskite Absorber Material Bulk-heterojunction Stability lies at interfaces 30% PCE Light Management Interface Modification Material Optimization Ambitiousness Ag C-Si (n) a-Si:H (i) a-Si:H (n+) ITO NiO LiF PCBM SnO2/ZTO ITO LiF Ag ITO a-Si:H(i) a-Si:H(p+) Large-Eg PVK Acknowledge Cooperation Prof Alex Jen (City University of HK) Prof Haitao Huang (Polytechnic University of HK) Prof Yunxiang Xu (Sichuan University) “I’d put my money on the sun and solar energy, what a source of power. I hope we don’t have to wait until oil and coal run out, before we tackle that.“ — Thomas Edison, 1931