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Issue 10, 2016
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Easily accessible polymer additives for tuning the crystal-growth of perovskite thin-films for highly efficient solar cells

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Abstract

For perovskite solar cells (Pero-SCs), one of the key issues with respect to the power conversion efficiency (PCE) is the morphology control of the perovskite thin-films. In this study, an easily-accessible additive polyethylenimine (PEI) is utilized to tune the morphology of CH3NH3PbI3−xClx. With addition of 1.00 wt% of PEI, the smoothness and crystallinity of the perovskite were greatly improved, which were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). A summit PCE of 14.07% was achieved for the p-i-n type Pero-SC, indicating a 26% increase compared to those of the devices without the additive. Both photoluminescence (PL) and alternating current impedance spectroscopy (ACIS) analyses confirm the efficiency results after the addition of PEI. This study provides a low-cost polymer additive candidate for tuning the morphology of perovskite thin-films, and might be a new clue for the mass production of Pero-SCs.

Graphical abstract: Easily accessible polymer additives for tuning the crystal-growth of perovskite thin-films for highly efficient solar cells

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Publication details

The article was received on 09 Jan 2016, accepted on 02 Feb 2016 and first published on 05 Feb 2016


Article type: Paper
DOI: 10.1039/C6NR00206D
Nanoscale, 2016,8, 5552-5558

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    Easily accessible polymer additives for tuning the crystal-growth of perovskite thin-films for highly efficient solar cells

    Q. Dong, Z. Wang, K. Zhang, H. Yu, P. Huang, X. Liu, Y. Zhou, N. Chen and B. Song, Nanoscale, 2016, 8, 5552
    DOI: 10.1039/C6NR00206D

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