Blending of n-type Semiconducting Polymer and PC61 BM for an Efficient Electron-Selective Material to Boost the Performance of the Planar Perovskite Solar Cell

Authors
Seo, You-HyunYeo, Jun-SeokMyoung, NoSoungYim, Sang-YoupKang, MinjiKim, Dong-YuNa, Seok-In
Issue Date
2016-05
Publisher
American Chemical Society
Citation
ACS Applied Materials & Interfaces, v.8, no.20, pp.12822 - 12829
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(NDI20D-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
TRIHALIDE PEROVSKITE; HYSTERESIS; LAYER; STATE; perovskite solar cells; planar structures; small molecules; polymer binders; charge extractions; interfacial layers
ISSN
1944-8244
URI
https://pubs.kist.re.kr/handle/201004/124088
DOI
10.1021/acsami.6b02478
Appears in Collections:
KIST Article > 2016
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