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

You-Hyun Seo; Jun-Seok Yeo; NoSoung Myoung; Sang-Youp Yim; Minji Kang; Dong-Yu Kim; Seok-In Na

doi:10.1021/acsami.6b02478

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

ACS Appl Mater Interfaces. 2016 May 25;8(20):12822-9. doi: 10.1021/acsami.6b02478. Epub 2016 May 16.

Authors

You-Hyun Seo¹, Jun-Seok Yeo, NoSoung Myoung, Sang-Youp Yim, Minji Kang, Dong-Yu Kim, Seok-In Na¹

Affiliation

¹ Professional Graduate School of Flexible and Printable Electronics and Polymer Materials Fusion Research Center, Chonbuk National University , Jeonju-si, Jeollabuk-do 561-756, Republic of Korea.

PMID: 27160866
DOI: 10.1021/acsami.6b02478

Abstract

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.

Keywords: charge extractions; interfacial layers; perovskite solar cells; planar structures; polymer binders; small molecules.

Publication types

Research Support, Non-U.S. Gov't