Iodide-reduced graphene oxide with dopant-free spiro-OMeTAD for ambient stable and high-efficiency perovskite solar cells

2015 ◽  
Vol 3 (31) ◽  
pp. 15996-16004 ◽  
Author(s):  
Qiang Luo ◽  
Ye Zhang ◽  
Chengyang Liu ◽  
Jianbao Li ◽  
Ning Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Solar Cells ◽  
Reduced Graphene Oxide ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Reduced Graphene ◽  
The Stability

A p-type and highly conductive reduced graphene oxide combined with dopant-free spiro-OMeTAD as a hole transport layer improves the stability of perovskite solar cells.

scholarly journals Polyaniline/Reduced Graphene Oxide Composites for Hole Transporting Layer of High-Performance Inverted Perovskite Solar Cells

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1281
Author(s):  
Jae Woong Jung ◽  
Seung Hwan Son ◽  
Jun Choi
Keyword(s):  
Graphene Oxide ◽  
Solar Cells ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Composite Films ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Reduced Graphene

We herein address the optoelectronic properties of polyaniline composite films with graphene oxide and reduced graphene oxide as a hole transport layer in inverted perovskite solar cells. The composite films exhibited enhanced electrical conductivity and suitable energy level matching with CH3NH3PbI3 for efficient hole extraction/transport than the pristine polyaniline film, which thus can deliver improved photovoltaic properties of device. The composite film-based devices exhibited maximum efficiency of 16.61%, which is enhanced by 21.6% from the device with the pristine polyaniline hole transport layer (efficiency = 13.66%). The reduced graphene oxide-based composite film also achieved improved long-term operative stability as compared to the pristine polyaniline-based device, demonstrating a great potential of reduced graphene oxide/polyaniline composite hole transport layer for high performance perovskite solar cells.

Moderately reduced graphene oxide via UV-ozone treatment as hole transport layer for high efficiency organic solar cells

2018 ◽  
Vol 59 ◽  
pp. 140-148 ◽  
Author(s):  
Saqib Rafique ◽  
Shahino Mah Abdullah ◽  
Javed Iqbal ◽  
Asim Jilani ◽  
Sajith Vattamkandathil ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Solar Cells ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Hole Transport ◽  
Transport Layer ◽  
Ozone Treatment ◽  
Hole Transport Layer ◽  
Reduced Graphene ◽  
Uv Ozone

scholarly journals Fluorinated Reduced Graphene Oxide as an Efficient Hole-Transport Layer for Efficient and Stable Polymer Solar Cells

ACS Omega ◽  
2017 ◽  
Vol 2 (5) ◽  
pp. 2010-2016 ◽  
Author(s):  
Xiaofang Cheng ◽  
Juan Long ◽  
Rui Wu ◽  
Liqiang Huang ◽  
Licheng Tan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Solar Cells ◽  
Reduced Graphene Oxide ◽  
Polymer Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Reduced Graphene

scholarly journals The challenge of designing accelerated indoor tests to predict the outdoor lifetime of perovskite solar cells

2021 ◽  
Author(s):  
Hans Köbler ◽  
Mark V. Khenkin ◽  
Rajarshi Roy ◽  
Nga Phung ◽  
Quiterie Emery ◽  
...  
Keyword(s):  
Solar Cells ◽  
Real World ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Constant Illumination ◽  
Transient Behaviour ◽  
Small Change

Abstract Over the past decade, perovskite solar cells have travelled an amazing way towards high efficiency. However, a major roadblock remaining is the operational stability, while achieving technological maturity and proving real-world stability is crucial to gain trust among investors. In that sense, it is of high interest to be able to predict the operational lifetime, which needs to be in the range of years or decades, within an experimentally reasonable timeframe. Yet, peculiarities of perovskite solar cells’ ageing behaviour lead to severe difficulties in translating the results of indoor tests to their outdoor counterpart. In particular, transient processes cause diverse results among different ageing tests.Here, for the first time, we show a complete set of constant illumination indoor testing, cycled illumination indoor testing and real-world outdoor testing on equal in-house devices. Exemplarily, we compare two different types of perovskite solar cells, in which only the hole-transport layer is varied. Despite this small change, the devices show distinctly different transient behaviour. In either case, the commonly used constant illumination experiments fail to predict the outdoor behaviour of the cell. Yet, we observe a good correlation between the cycled illumination test and the outdoor behaviour of one of the two solar cells, while this is not the case for the other system. This result highlights the urge for further research on how to perform meaningful accelerated indoor tests to predict the outdoor lifetime of perovskite solar cells.

scholarly journals Unraveling Passivation Mechanism of Imidazolium-Based Ionic Liquids on Inorganic Perovskite to Achieve Near-Record-Efficiency CsPbI2Br Solar Cells

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Jie Xu ◽  
Jian Cui ◽  
Shaomin Yang ◽  
Yu Han ◽  
Xi Guo ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Solar Cells ◽  
Performance Improvement ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Light Illumination ◽  
Ionic Bonds ◽  
The Stability

AbstractThe application of ionic liquids in perovskite has attracted wide-spread attention for its astounding performance improvement of perovskite solar cells (PSCs). However, the detailed mechanisms behind the improvement remain mysterious. Herein, a series of imidazolium-based ionic liquids (IILs) with different cations and anions is systematically investigated to elucidate the passivation mechanism of IILs on inorganic perovskites. It is found that IILs display the following advantages: (1) They form ionic bonds with Cs+ and Pb2+ cations on the surface and at the grain boundaries of perovskite films, which could effectively heal/reduce the Cs+/I− vacancies and Pb-related defects; (2) They serve as a bridge between the perovskite and the hole-transport-layer for effective charge extraction and transfer; and (3) They increase the hydrophobicity of the perovskite surface to further improve the stability of the CsPbI2Br PSCs. The combination of the above effects results in suppressed non-radiative recombination loss in CsPbI2Br PSCs and an impressive power conversion efficiency of 17.02%. Additionally, the CsPbI2Br PSCs with IILs surface modification exhibited improved ambient and light illumination stability. Our results provide guidance for an in-depth understanding of the passivation mechanism of IILs in inorganic perovskites."Image missing"

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