Session Index

Photovoltaic Technology

Photovoltaic Technology III.
Saturday, Dec. 5, 2015  09:00-10:30
Chair: Dr. Tatsuo Mori
Room: Delta 104(1F)
09:00 - 09:30 Paper No.  2015-SAT-S0903-I001
Invited Speaker:
Ziv Hameiri
Spatially Resolved Lifetime Spectroscopy from Temperature-Dependent Photoluminescence Imaging

In recent years, photoluminescence imaging has been extensively used for spatially resolved measurements of many electronic material and device parameters of silicon wafers and silicon solar cells. However, photoluminescence imaging at elevated temperatures has not been widely used. This study presents proof-of-concept data for spatially-resolved temperature-dependent lifetime spectroscopy, based on photoluminescence images taken at various temperatures.

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09:30 - 10:00 Paper No.  2015-SAT-S0903-I002
Invited Speaker:
Liyuan Han
Efficient and Stable large-area Perovskite Solar cells

In this presentation, I will demonstrate our recent achievement on PSCs that a certified efficiency of 15% was obtained from devices with working area over 1 cm2. To realize this achievement, we put our focus on two aspects: one is improving the reproducibility of device performance through controlling the morphology and uniformity of photoactive and charge transport layers in the solar cells; the other is increasing the long-term stability of device by developing new charge transport materials with low hygroscopicity and high carrier mobility. For example, we developed a new method for fabricating uniform CH3NH3PbI3 layer with using uncrystallized PbI2 precursor films, which overcame the problem of incomplete conversion and uncontrolled particle sizes of perovskite, thus greatly increasing the film uniformity and reproducibility. We developed a dopant-free carrier transport material that has low hygroscopicity and high carrier mobility, with which we successfully improved the stability of the complete devices. Efforts have also been made to improve the blocking effect of electron and hole interfacial passivation layers in large area devices. As a result, we achieved 15% conversion efficiency in perovskite solar cells (> 1 cm2) for the first time in the world through the official evaluation by the international standard testing organization (Calibration, Standards and Measurement Team at the Research Center for Photovoltaics, National Institute of Advanced Industrial Science and Technology (AIST)).

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10:00 - 10:15 Paper No.  2015-SAT-S0903-O001
Ming-Hsien Li Inorganic NiO and spiro-based p-type contact for efficient perovskite solar cells

We reveal two potential hole transport materials (HTMs) for efficient perovskite solar cells. First, low temperature sputtered NiOx thin film was employed as an effective electron blocking layer for mesoscopic NiO/CH3NH3PbI3 perovskite solar cells (PSCs). With adequate doping under 10% oxygen flow ratio, we achieved efficiency of 11.6%. Secondly, three spiro-acridine-fluorene based HTMs, namely: CW3, CW4 and CW5, were employed in fabrication of mesoporous TiO2/CH3NH3PbI3 PSCs. The best efficiency of 16.56% is achieved for CW4-based PSCs.

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10:15 - 10:30 Paper No.  2015-SAT-S0903-O002
Chou Chau Yuan-Fong Design of a periodic metallic nanobeads array on plasmonic thin film solar cell for increasing the harvesting light

We investigate a periodic metallic nanobeads array on plasmonic thin film solar cell (TFSC) for increasing the harvesting light in active layer of the TFSC. Simulation method is performed by using the finite element method and the results can significantly enhance the plasmonic activity in TFSC.

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