Description
Date/Time: 04-04-2018 - Wednesday - 05:00 PM - 07:00 PM
Deng Wang1 Jishu Gao1 Hang Hu1 Jiabang Chen1 Baomin Xu1

1, Southern University of Science and Technology, Shenzhen, , China

Perovskite solar cells (PSCs) have been received great attention in recent years due to their high power conversion efficiency (PCE) and low temperature solution process, and thus can be fabricated on flexible substrate such as metal-coated PEN or PET plastic. The highest PCEs of PSCs have been increased from initially 3.8% to now more than 20% [1]. However, most high-efficiency PSCs have been developed using non-scalable fabrication technologies such as spin-casting, and in strictly-controlled atmosphere like in N2 filled glovebox. Hence, it is critical to study on the fabrication of high-quality PSCs with scalable printing techniques such as doctor blade-coating under the ambient condition, in order to accomplish the final commercialization [2].
In this work, we have developed a fully printed process under ambient condition to fabricate flexible PSCs. The structure we employ is a typical inverted “p-i-n” structure, and we adopt one-step method to fabricate the perovskite layer with lead iodide as lead source. PEDOT:PSS and PCBM serve as the hole transport layer and electron transport layer respectively. Except that Ag electrode is deposited by thermal evaporation, all other layers are prepared by blade-coating method under the ambient condition. The test results show that, the PCE of solar cells with 0.1cm2 active area can achieve PCE of 8.95%, with Jsc= 17.4 mA/cm2, Voc=0.83V and FF=62%. The SEM images indicate that the perovskite layer is highly crystalline and has uniform surface coverage. The detailed information about the effect of ink and printing parameters on the properties and microstructures of PCSs will be presented at the Meeting. We believe this preparation technique has great potential to fabricate large area and high quality flexible PSCs, and lay down the foundation for the industrialization of PSCs.
References
1. Yang, W., Park, B., Jung, E., Jeon, N., Kim, Y., Lee, D., Shin, S., Seo, J., Kim, E., Noh, J. and Seok, S. (2017). Iodide management in formamidinium-lead-halide–based perovskite layers for efficient solar cells. Science, 356(6345), pp.1376-1379.
2. Yang, Z., Chueh, C., Zuo, F., Kim, J., Liang, P., & Jen, A. (2015). High-Performance Fully Printable Perovskite Solar Cells via Blade-Coating Technique under the Ambient Condition. Advanced Energy Materials, 5(13), 1500328.

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Meeting Program
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5:00 PM–7:00 PM Apr 4, 2018

PCC North, 300 Level, Exhibit Hall C-E