高效稳定钙钛矿太阳能电池
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摘要
钙钛矿太阳能电池是极具发展潜力的低成本太阳能电池,目前的能量转化效率超过了20%。但是,高效率电池的工作面积很小,远低于1平方厘米,工作寿命也很短。由于小面积电池的测量误差比较大,加上器件的稳定性差,电池性能的可靠性一直受到质疑。因此,非常有必要发展面积更大大、稳定性更好的高效率钙钛矿太阳能电池。这将有助于加快该领域的研究进展和未来应用。这里我将介绍我们最近在高效稳定钙钛矿太阳能电池上的研究工作。主要内容分为两个方面:一是通过制备均匀的钙钛矿薄膜和电荷传输层薄膜来提高器件的可重复性;二是通过开发疏水性和高电荷迁移率材料来提高器件的稳定性。我们在1平方厘米钙钛矿太阳能电池上获得了15.57%效率,该结果得到国际标准测试中心的认证。在稳定性测试方面,经过85度下500小时的老化测试,器件的效率仍然保持15%以上。
In this presentation, I will demonstrate our latest work to achieve a certified efficiency of 15.57% on a PSC with working area of over 1 cm2. To realize this achievement, we put our focus on two aspects: one is high reproducibility of device performance through controlling the formation of uniform perovskite layer and charge transport layers; the other is the long-term device stability by developing new charge transport materials with low hygroscopicity and high carrier mobility. As a result, we obtained power conversion efficiency to 15.57% in perovskite solar cells(> 1 cm2) through the official evaluation by the international standard testing organization(Calibration, Standards and Measurement Team at the Research Center for Photovoltaics. The efficiency was stable of over 15% for 500 hours at 85 ℃ or 5,000 hours at room temperature.
引文
[1]Wu,Y.Z.;Islam,A.;Yang,X.D.;Qin,C.J.;Liu,J.;Zhang,K.;Peng,W.Q.;Han,L.Y.,Energy Environ.Sci.,2014,7,2934-2938.
    [2]Liu,J.;Wu,Y.Z.;Qin,C.J.;Yang,X.D.;Yasuda,T.;Islam,A.;Zhang,K.;Peng,W.Q.;Chen,W.;Han,L.Y.,Energy Environ.Sci.,2014,7,2963-2967.
    [3]Chen,W.;Wu,Y.;Liu,J.;Qin,C.;Yang,X.;Islam,A.;Cheng,Y.-B.;Han,L.,Energy Environ.Sci.2015,8(2),629-640.
    [4]Chen,W.;Wu,Y.;Yue,Y.;Liu,J.;Zhang,W.;Yang,X.;Chen,H.;Bi,E.;Ashraful,I.;Gratzel,M.;Han,L.,Science 2015,350(6263),944-8.

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