Journal ArticleDOI
Low-Temperature In Situ Amino Functionalization of TiO2 Nanoparticles Sharpens Electron Management Achieving over 21% Efficient Planar Perovskite Solar Cells.
Wanpei Hu,Weiran Zhou,Xunyong Lei,Pengcheng Zhou,Mengmeng Zhang,Tao Chen,Hualing Zeng,Jun Zhu,Songyuan Dai,Shihe Yang,Shihe Yang,Shangfeng Yang +11 more
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TLDR
A facile one-step, low-temperature, nonhydrolytic approach to in situ synthesizing amino-functionalized TiO2 nanoparticles (abbreviated as NH2 -TiO2 NPs) is developed by chemical bonding of amino (-NH2 ) groups, via TiN bonds, onto the surface of TiO1 NPs.Abstract:
Titanium oxide (TiO2 ) has been commonly used as an electron transport layer (ETL) of regular-structure perovskite solar cells (PSCs), and so far the reported PSC devices with power conversion efficiencies (PCEs) over 21% are mostly based on mesoporous structures containing an indispensable mesoporous TiO2 layer. However, a high temperature annealing (over 450 °C) treatment is mandatory, which is incompatible with low-cost fabrication and flexible devices. Herein, a facile one-step, low-temperature, nonhydrolytic approach to in situ synthesizing amino-functionalized TiO2 nanoparticles (abbreviated as NH2 -TiO2 NPs) is developed by chemical bonding of amino (-NH2 ) groups, via TiN bonds, onto the surface of TiO2 NPs. NH2 -TiO2 NPs are then incorporated as an efficient ETL in n-i-p planar heterojunction (PHJ) PSCs, affording PCE over 21%. Cs0.05 FA0.83 MA0.12 PbI2.55 Br0.45 (abbreviated as CsFAMA) PHJ PSC devices based on NH2 -TiO2 ETL exhibit the best PCE of 21.33%, which is significantly higher than that of the devices based on the pristine TiO2 ETL (19.82%) and is close to the record PCE for devices with similar structures and fabrication procedures. Besides, due to the passivation of the surface trap states of perovskite film, the hysteresis of current-voltage response is significantly suppressed, and the ambient stability of devices is improved upon amino functionalization.read more
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Hydrothermal deposition of antimony selenosulfide thin films enables solar cells with 10% efficiency
Rongfeng Tang,Xiaomin Wang,Weitao Lian,Jialiang Huang,Qi Wei,Menglin Huang,Yiwei Yin,Chenhui Jiang,Shangfeng Yang,Guichuan Xing,Shiyou Chen,Changfei Zhu,Xiaojing Hao,Martin A. Green,Tao Chen +14 more
TL;DR: In this article, the authors demonstrate a hydrothermal approach to deposit high-quality Sb2(S,Se)3 films and demonstrate that increasing the Se/S ratio leads to a favorable orientation of the (Sb4S(e)6)n ribbons.
Journal ArticleDOI
Multifunctional Polymer-Regulated SnO2 Nanocrystals Enhance Interface Contact for Efficient and Stable Planar Perovskite Solar Cells.
Shuai You,Haipeng Zeng,Zhiliang Ku,Xiaoze Wang,Zhen Wang,Yaoguang Rong,Yang Zhao,Xin Zheng,Long Luo,Lin Li,Shujing Zhang,Min Li,Xingyu Gao,Xiong Li +13 more
TL;DR: Here, the efficiency and stability of planar PSCs are enhanced by improving the interface contact between the SnO2 electron-transport layer (ETL) and the perovskite layer, which results in high operational stability and promising potential for application in flexible and large-area devices.
Journal ArticleDOI
Coagulated SnO 2 Colloids for High-Performance Planar Perovskite Solar Cells with Negligible Hysteresis and Improved Stability.
TL;DR: This work provides an alternative strategy to boost the device performance from a synergic optimization toward the electronic property of charge transport layer and the interface and reports a facile and effective method to simultaneously tune the electronicproperty of SnO2 and passivate the defects at the interface between the perovskite andsnO2.
Journal ArticleDOI
Rubidium Fluoride Modified SnO 2 for Planar n‐i‐p Perovskite Solar Cells
Jing Zhuang,Peng Mao,Yigang Luan,Ningli Chen,Xiaofei Cao,Guosheng Niu,Feifei Jia,Fuyi Wang,Shaokui Cao,Jizheng Wang +9 more
Journal ArticleDOI
Graphdiyne: Bridging SnO 2 and Perovskite in Planar Solar Cells
Suicai Zhang,Haonan Si,Wenqiang Fan,Shi Mingyue,Minghua Li,Chenzhe Xu,Zheng Zhang,Qingliang Liao,Abdul Sattar,Zhuo Kang,Yue Zhang +10 more
TL;DR: In this paper, a graphdiyne (GDY) with multi-roles has been incorporated to maximize the matching between SnO2 and perovskite regarding electron extraction rate optimization and interface engineering.
References
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Journal ArticleDOI
Visible-Light Photocatalysis in Nitrogen-Doped Titanium Oxides
TL;DR: Film and powders of TiO2-x Nx have revealed an improvement over titanium dioxide (TiO2) under visible light in optical absorption and photocatalytic activity such as photodegradations of methylene blue and gaseous acetaldehyde and hydrophilicity of the film surface.
Journal ArticleDOI
Interface engineering of highly efficient perovskite solar cells
Huanping Zhou,Qi Chen,Gang Li,Song Luo,Tze Bing Song,Hsin Sheng Duan,Ziruo Hong,Jingbi You,Yongsheng Liu,Yang Yang +9 more
TL;DR: Perovskite films received a boost in photovoltaic efficiency through controlled formation of charge-generating films and improved current transfer to the electrodes and low-temperature processing steps allowed the use of materials that draw current out of the perovskites layer more efficiently.
Journal ArticleDOI
Efficient tandem polymer solar cells fabricated by all-solution processing.
Jin Young Kim,Jin Young Kim,Kwanghee Lee,Kwanghee Lee,Nelson E. Coates,Nelson E. Coates,Daniel Moses,Daniel Moses,Thuc-Quyen Nguyen,Thuc-Quyen Nguyen,Mark Dante,Mark Dante,Alan J. Heeger,Alan J. Heeger +13 more
TL;DR: Tandem solar cells, in which two solar cells with different absorption characteristics are linked to use a wider range of the solar spectrum, were fabricated with each layer processed from solution with the use of bulk heterojunction materials comprising semiconducting polymers and fullerene derivatives.
Journal ArticleDOI
Incorporation of rubidium cations into perovskite solar cells improves photovoltaic performance
Michael Saliba,Taisuke Matsui,Taisuke Matsui,Konrad Domanski,Ji-Youn Seo,Amita Ummadisingu,Shaik M. Zakeeruddin,Juan-Pablo Correa-Baena,Wolfgang Tress,Antonio Abate,Anders Hagfeldt,Michael Grätzel +11 more
TL;DR: This work shows that the small and oxidation-stable rubidium cation (Rb+) can be embedded into a “cation cascade” to create perovskite materials with excellent material properties and achieved stabilized efficiencies of up to 21.6% on small areas.
Journal ArticleDOI
Efficient and stable solution-processed planar perovskite solar cells via contact passivation.
Hairen Tan,Ankit Jain,Oleksandr Voznyy,Xinzheng Lan,F. Pelayo García de Arquer,James Z. Fan,Rafael Quintero-Bermudez,Mingjian Yuan,Bo Zhang,Yicheng Zhao,Fengjia Fan,Peicheng Li,Li Na Quan,Yongbiao Zhao,Zheng-Hong Lu,Zhenyu Yang,Sjoerd Hoogland,Edward H. Sargent +17 more
TL;DR: A contact-passivation strategy using chlorine-capped TiO2 colloidal nanocrystal film that mitigates interfacial recombination and improves interface binding in low-temperature planar solar cells is reported.