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Issue 8, 2018
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Interfacial engineering via inserting functionalized water-soluble fullerene derivative interlayers for enhancing the performance of perovskite solar cells

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Abstract

For n–i–p type perovskite solar cells (Pero-SCs), one of the limitations which hinder the improvement of device performance is the extremely low electrical conductivity of the TiO2 electron transport layer (ETL). Herein, two novel functionalized water-soluble fullerene derivatives C60O∼18(OH)∼10(NH2)∼8 (f-C60) and C70O∼18(OH)∼10(NH2)∼10 (f-C70) were prepared and utilized as buffer layers between ITO and a vacuum-deposited fullerene C60 ETL in Pero-SCs. After inserting f-C60 and f-C70 layers, the Pero-SCs showed an enhanced crystallinity of the perovskite film, more efficient charge transport, reduced recombination and a decreased charge-transport resistance. Therefore, a summit power conversion efficiency (PCE) of 16.97% was achieved for the device with the f-C60/C60 ETL, which was ∼24% higher than that of the control device (13.71%). The PCE of the Pero-SC based on the f-C70/C60 ETL also exhibited a 16% enhancement. This work demonstrated the great potential of f-C60 and f-C70 for application as ETLs in Pero-SCs.

Graphical abstract: Interfacial engineering via inserting functionalized water-soluble fullerene derivative interlayers for enhancing the performance of perovskite solar cells

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Supplementary files

Article information


Submitted
25 Nov 2017
Accepted
18 Jan 2018
First published
18 Jan 2018

J. Mater. Chem. A, 2018,6, 3435-3443
Article type
Paper

Interfacial engineering via inserting functionalized water-soluble fullerene derivative interlayers for enhancing the performance of perovskite solar cells

T. Cao, P. Huang, K. Zhang, Z. Sun, K. Zhu, L. Yuan, K. Chen, N. Chen and Y. Li, J. Mater. Chem. A, 2018, 6, 3435
DOI: 10.1039/C7TA10366B

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