Efficient Inverted Perovskite Solar Cells with Low Voltage Loss Achieved by a Pyridine-Based Dopant-Free Polymer Semiconductor
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Pages (from-to) | 7227-7233 |
Journal / Publication | Angewandte Chemie - International Edition |
Volume | 60 |
Issue number | 13 |
Online published | 28 Dec 2020 |
Publication status | Published - 22 Mar 2021 |
Link(s)
DOI | DOI |
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Document Link | |
Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85101080162&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(b0f56eb5-5622-4b24-8282-f8b0c556b51d).html |
Abstract
Currently, the performance improvement for inverted perovskite solar cells (PVSCs) is mainly limited by the high open circuit voltage (VOC) loss caused by detrimental non-radiative recombination (NRR) processes. Herein, we report a simple and efficient way to simultaneously reduce the NRR processes inside perovskites and at the interface by rationally designing a new pyridine-based polymer hole-transporting material (HTM), PPY2, which exhibits suitable energy levels with perovskites, high hole mobility, effective passivation of the uncoordinated Pb2+ and iodide defects, as well as the capability of promoting the formation of high-quality polycrystalline perovskite films. In absence of any dopants, the inverted PVSCs using PPY2 as the HTM deliver an encouraging PCE up to 22.41 % with a small VOC loss (0.40 V), among the best device performances for inverted PVSCs reported so far. Furthermore, PPY2-based unencapsulated devices show an excellent long-term photostability, and over 97 % of its initial PCE can be maintained after one sun constant illumination for 500 h.
Research Area(s)
- defect passivation, dopant-free hole-transporting materials, inverted perovskite solar cells, non-radiative recombination
Citation Format(s)
Efficient Inverted Perovskite Solar Cells with Low Voltage Loss Achieved by a Pyridine-Based Dopant-Free Polymer Semiconductor. / Sun, Xianglang; Li, Zhen; Yu, Xinyu et al.
In: Angewandte Chemie - International Edition, Vol. 60, No. 13, 22.03.2021, p. 7227-7233.
In: Angewandte Chemie - International Edition, Vol. 60, No. 13, 22.03.2021, p. 7227-7233.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review