Efficient inverted perovskite solar cells with truxene-bridged PDI trimers as electron transporting materials

Rui Wang; Kui Jiang; Han Yu; Fei Wu; Linna Zhu; He Yan

doi:10.1039/c9qm00329k

Efficient inverted perovskite solar cells with truxene-bridged PDI trimers as electron transporting materials

Rui Wang, Kui Jiang, Han Yu, Fei Wu^*, Linna Zhu^*, He Yan^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

25 Citations (Scopus)

Abstract

Two truxene-bridged PDI trimers were designed and synthesized as electron transporting materials (ETMs) in inverted perovskite solar cells (PSCs). The truxene moiety was chosen as the core structure, which was end-capped by perylene diimide (PDI) units through the C-C single bond (Tr-PDI₃) and the fused ring (Tr-PDI₃-C), respectively. It turned out that the perovskite active layer coated with Tr-PDI₃ exhibited smoother film morphology, and higher electron transport and extraction ability compared to that covered by Tr-PDI₃-C. As a result, a decent power conversion efficiency (PCE) of 17.45% was achieved in the Tr-PDI₃ based device, higher than that with the Tr-PDI₃-C electron transporting layer (16.90%). Notably, the performance of inverted PSCs was further enhanced by incorporating Tr-PDI₃ or Tr-PDI₃-C as the interfacial layer between the perovskite layer and the C₆₀ electron transporting layer. Champion PCEs of 19.83% and 19.24% were achieved in the devices based on the Tr-PDI₃ and Tr-PDI₃-C interlayer, respectively. The control device without an interlayer shows an inferior efficiency of 17.53%. These results demonstrate that Tr-PDI₃ and Tr-PDI₃-C are promising electron extraction and electron transporting materials in inverted PSCs.

Original language	English
Pages (from-to)	2137-2142
Number of pages	6
Journal	Materials Chemistry Frontiers
Volume	3
Issue number	10
Online published	30 Aug 2019
DOIs	https://doi.org/10.1039/c9qm00329k
Publication status	Published - 1 Oct 2019
Externally published	Yes

Funding

The authors thank the National Natural Science Foundation of China (No. 51703183), and the Basic and Frontier Research Program of Chongqing Municipality (cstc2018jcyjAX0568) for financial support. We also thank HKUST President's Office for support through SSTSP project number FP201, and the Shen Zhen Technology and Innovation Commission (project number JCYJ20170413173814007).

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Research Keywords

NON-FULLERENE
SMALL-MOLECULE
PERFORMANCE
DERIVATIVES
ACCEPTOR
POLYMER
LAYER
DIMER

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abstract = "Two truxene-bridged PDI trimers were designed and synthesized as electron transporting materials (ETMs) in inverted perovskite solar cells (PSCs). The truxene moiety was chosen as the core structure, which was end-capped by perylene diimide (PDI) units through the C-C single bond (Tr-PDI3) and the fused ring (Tr-PDI3-C), respectively. It turned out that the perovskite active layer coated with Tr-PDI3 exhibited smoother film morphology, and higher electron transport and extraction ability compared to that covered by Tr-PDI3-C. As a result, a decent power conversion efficiency (PCE) of 17.45% was achieved in the Tr-PDI3 based device, higher than that with the Tr-PDI3-C electron transporting layer (16.90%). Notably, the performance of inverted PSCs was further enhanced by incorporating Tr-PDI3 or Tr-PDI3-C as the interfacial layer between the perovskite layer and the C60 electron transporting layer. Champion PCEs of 19.83% and 19.24% were achieved in the devices based on the Tr-PDI3 and Tr-PDI3-C interlayer, respectively. The control device without an interlayer shows an inferior efficiency of 17.53%. These results demonstrate that Tr-PDI3 and Tr-PDI3-C are promising electron extraction and electron transporting materials in inverted PSCs.",

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AU - Wang, Rui

AU - Jiang, Kui

AU - Yu, Han

AU - Wu, Fei

AU - Zhu, Linna

AU - Yan, He

PY - 2019/10/1

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N2 - Two truxene-bridged PDI trimers were designed and synthesized as electron transporting materials (ETMs) in inverted perovskite solar cells (PSCs). The truxene moiety was chosen as the core structure, which was end-capped by perylene diimide (PDI) units through the C-C single bond (Tr-PDI3) and the fused ring (Tr-PDI3-C), respectively. It turned out that the perovskite active layer coated with Tr-PDI3 exhibited smoother film morphology, and higher electron transport and extraction ability compared to that covered by Tr-PDI3-C. As a result, a decent power conversion efficiency (PCE) of 17.45% was achieved in the Tr-PDI3 based device, higher than that with the Tr-PDI3-C electron transporting layer (16.90%). Notably, the performance of inverted PSCs was further enhanced by incorporating Tr-PDI3 or Tr-PDI3-C as the interfacial layer between the perovskite layer and the C60 electron transporting layer. Champion PCEs of 19.83% and 19.24% were achieved in the devices based on the Tr-PDI3 and Tr-PDI3-C interlayer, respectively. The control device without an interlayer shows an inferior efficiency of 17.53%. These results demonstrate that Tr-PDI3 and Tr-PDI3-C are promising electron extraction and electron transporting materials in inverted PSCs.

AB - Two truxene-bridged PDI trimers were designed and synthesized as electron transporting materials (ETMs) in inverted perovskite solar cells (PSCs). The truxene moiety was chosen as the core structure, which was end-capped by perylene diimide (PDI) units through the C-C single bond (Tr-PDI3) and the fused ring (Tr-PDI3-C), respectively. It turned out that the perovskite active layer coated with Tr-PDI3 exhibited smoother film morphology, and higher electron transport and extraction ability compared to that covered by Tr-PDI3-C. As a result, a decent power conversion efficiency (PCE) of 17.45% was achieved in the Tr-PDI3 based device, higher than that with the Tr-PDI3-C electron transporting layer (16.90%). Notably, the performance of inverted PSCs was further enhanced by incorporating Tr-PDI3 or Tr-PDI3-C as the interfacial layer between the perovskite layer and the C60 electron transporting layer. Champion PCEs of 19.83% and 19.24% were achieved in the devices based on the Tr-PDI3 and Tr-PDI3-C interlayer, respectively. The control device without an interlayer shows an inferior efficiency of 17.53%. These results demonstrate that Tr-PDI3 and Tr-PDI3-C are promising electron extraction and electron transporting materials in inverted PSCs.

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KW - DERIVATIVES

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Efficient inverted perovskite solar cells with truxene-bridged PDI trimers as electron transporting materials

Abstract

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