Blending of n-type Semiconducting Polymer and PC61BM for an Efficient Electron-Selective Material to Boost the Performance of the Planar Perovskite Solar Cell

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• 作者：You-Hyun Seo ; Jun-Seok Yeo ; NoSoung Myoung ; Sang-Youp Yim ; Minji Kang ; Dong-Yu Kim ; Seok-In Na
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：May 25, 2016
• 年：2016
• 卷：8
• 期：20
• 页码：12822-12829
• 全文大小：466K
• 年卷期：0
• ISSN：1944-8252

文摘

The highly efficient CH₃NH₃PbI₃ perovskite solar cell (PeSC) is simply achieved by employing a blended electron-transport layer (ETL) consisting of PC₆₁BM and P(NDI2OD-T2). The high molecular weight of P(NDI2OD-T2) allows for a thinned ETL with a uniform morphology that optimizes the PC₆₁BM ETL more effectively. As a result of this enhancement, the power conversion efficiency of a PC₆₁BM:P(NDI2OD-T2)-based PeSC is 25% greater than that of the conventional PC₆₁BM based-PeSC; additionally, the incorporation of P(NDI2OD-T2) into PC₆₁BM attenuates the dependence of the PeSC on the ETL-processing conditions regarding its performance. It is revealed that, in addition to the desirable n-type semiconducting characteristics of PC₆₁BM:P(NDI2OD-T2)—including a higher electron-mobility and a more-effective electron selectivity of a blended ETL for an efficient electron extraction—the superior performance of a PC₆₁BM:P(NDI2OD-T2) device is the result of a thinned and uniformly covered ETL on the perovskite layer.