scholarly journals Bulk and interfacial decomposition of formamidinium iodide (HC(NH2)2I) in contact with metal oxide

2020 ◽  
Vol 1 (9) ◽  
pp. 3349-3357
Author(s):  
Sampreetha Thampy ◽  
Boya Zhang ◽  
Jong-Goo Park ◽  
Ki-Ha Hong ◽  
Julia W. P. Hsu
Keyword(s):  
Metal Oxide ◽  
Interfacial Reaction ◽  
Transport Layer ◽  
Intrinsic Stability

Interfacial reaction between formamidinium iodide and metal oxide transport layer triggers degradation and lower the intrinsic stability which is dictated by the oxide, rather than the perovskite.

scholarly journals Low-temperature-processed metal oxide electron transport layers for efficient planar perovskite solar cells

Rare Metals ◽  
2021 ◽  
Author(s):  
Jia-Xing Song ◽  
Xin-Xing Yin ◽  
Zai-Fang Li ◽  
Yao-Wen Li
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Low Temperature ◽  
Metal Oxide ◽  
Low Cost ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Future Research ◽  
Low Temperature Preparation

Abstract As a promising photovoltaic technology, perovskite solar cells (pero-SCs) have developed rapidly over the past few years and the highest power conversion efficiency is beyond 25%. Nowadays, the planar structure is universally popular in pero-SCs due to the simple processing technology and low-temperature preparation. Electron transport layer (ETL) is verified to play a vital role in the device performance of planar pero-SCs. Particularly, the metal oxide (MO) ETL with low-cost, superb versatility, and excellent optoelectronic properties has been widely studied. This review mainly focuses on recent developments in the use of low-temperature-processed MO ETLs for planar pero-SCs. The optical and electronic properties of widely used MO materials of TiO2, ZnO, and SnO2, as well as the optimizations of these MO ETLs are briefly introduced. The commonly used methods for depositing MO ETLs are also discussed. Then, the applications of different MO ETLs on pero-SCs are reviewed. Finally, the challenge and future research of MO-based ETLs toward practical application of efficient planar pero-SCs are proposed. Graphical abstract

Manipulation of interface electronic structure by thin metal oxide films

2013 ◽  
Vol 1537 ◽  
Author(s):  
Chenggong Wang ◽  
Irfan ◽  
Yongli Gao
Keyword(s):  
Electronic Structure ◽  
Metal Oxide ◽  
Work Function ◽  
Oxide Layer ◽  
Indium Tin Oxide ◽  
Oxide Films ◽  
Hole Transport ◽  
Thin Metal ◽  
Transport Layer ◽  
Metal Oxide Films

AbstractWe have investigated the counter intuitive phenomenon of inserting a metal oxide layer to improve hole injection or extraction in organic semiconductor devices using ultraviolet photoemission, x-ray photoemission, and inverse photoemission spectroscopy (UPS, XPS and IPES). We observed that metal oxides, such as MoO3, substantially increase the work function when deposited on indium-tin-oxide (ITO). The increase lifts up the highest occupied molecular orbital (HOMO) of the hole transport layer, therefore reduces the energy barrier between the HOMO and the Fermi level of the anode. The uplift creates an interface band bending region that results in a drift electric field that encourages the collection of holes at the anode. The optimum thickness for the oxide layer is estimated to be 2 nm. We have also investigated the effects of ambient or O2 exposure of MoO3. We observed that while most of the electronic energy levels of the oxide remained largely intact, the work function reduction was significant. This opens a way for optimal energy level alignment by modifying the work function through exposure. Furthermore, we observed that the work function reduction by exposure could be reversed by proper annealing of the sample in vacuum. The investigations therefore point to manipulate the interface electronic structure and charge injection/extraction by thin metal oxide films.

scholarly journals Metal Oxide Compact Electron Transport Layer Modification for Efficient and Stable Perovskite Solar Cells

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2207 ◽  
Author(s):  
Md. Shahiduzzaman ◽  
Shoko Fukaya ◽  
Ersan Y. Muslih ◽  
Liangle Wang ◽  
Masahiro Nakano ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Metal Oxide ◽  
Perovskite Solar Cells ◽  
Clean Energy ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Future Research ◽  
Perovskite Layer ◽  
And Performance

Perovskite solar cells (PSCs) have appeared as a promising design for next-generation thin-film photovoltaics because of their cost-efficient fabrication processes and excellent optoelectronic properties. However, PSCs containing a metal oxide compact layer (CL) suffer from poor long-term stability and performance. The quality of the underlying substrate strongly influences the growth of the perovskite layer. In turn, the perovskite film quality directly affects the efficiency and stability of the resultant PSCs. Thus, substrate modification with metal oxide CLs to produce highly efficient and stable PSCs has drawn attention. In this review, metal oxide-based electron transport layers (ETLs) used in PSCs and their systemic modification are reviewed. The roles of ETLs in the design and fabrication of efficient and stable PSCs are also discussed. This review will guide the further development of perovskite films with larger grains, higher crystallinity, and more homogeneous morphology, which correlate to higher stable PSC performance. The challenges and future research directions for PSCs containing compact ETLs are also described with the goal of improving their sustainability to reach new heights of clean energy production.

Solution Process Feasible Highly Efficient Organic Light Emitting Diode with Hybrid Metal Oxide Based Hole Injection/Transport Layer

MRS Advances ◽  
2019 ◽  
Vol 4 (31-32) ◽  
pp. 1801-1809 ◽  
Author(s):  
Mangey Ram Nagar ◽  
Rohit Ashok Kumar Yadav ◽  
Deepak Kumar Dubey ◽  
Jwo-Huei Jou
Keyword(s):  
Metal Oxide ◽  
High Efficiency ◽  
Solution Process ◽  
Transport Layer ◽  
Hole Injection ◽  
Oled Device ◽  
Electron Blocking Layer ◽  
Light Emitting ◽  
Organic Light ◽  
Hybrid Metal Oxide

ABSTRACTOrganic light emitting diodes (OLEDs) have drawn great attention owing to their potential applications in high-quality flat display panels and smart solid-state lighting. Over the last three decades, numerous approaches have been made on material design and device physics to achieve high-efficiency and long-lifespan. Herein, we report a novel tactic to employ solution-processed hybrid metal oxide, molybdenum trioxide-tungsten trioxide (MoO3:WO3), as an efficient and stable hole injection/transport (HIL/HTL) and electron blocking layer for efficient OLEDs. By using phosphorescent orange-red emitter tris(2-phenylquinoline)-iridium(III) Ir(2-phq)3, MoO3:WO3 HIL based OLED device exhibits a power efficiency of 27.7 lm W-1 and 22.9 lm W-1 at 100 and 1000 cd m-2, respectively, which are 89% and 157% higher than that of conventional OLED device consisting of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) as an HIL. Moreover, the resulted device also displays 1.6 times lower turn-on voltage and 3.0 time higher brightness as compare to other counter part. The higher device performances of OLED device may be attributed to robust hole transporting ability, balanced charge carrier in the recombination zone and non-acidic nature of designed HIL. Our results demonstrate that a novel alternative approach based on transition metal oxide hybrid HIL/HTL as a substitute to PEDOT:PSS for high-efficiency solution process OLEDs.

High-performance metal oxide-free inverted perovskite solar cells using poly(bis(4-phenyl)(2,4,6-trimethylphenyl)amine) as the hole transport layer

2018 ◽  
Vol 6 (26) ◽  
pp. 6975-6981 ◽  
Author(s):  
Chongyang Xu ◽  
Zhihai Liu ◽  
Eun-Cheol Lee
Keyword(s):  
Solar Cells ◽  
Metal Oxide ◽  
High Performance ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Transfer Layer ◽  
Hole Transfer

A poly(bis(4-phenyl)(2,4,6-trimethylphenyl)amine) hole transfer layer was used to enhance the performance and lifetime of metal oxide-free inverted perovskite solar cells.

Performance enhancement through optimization of metal oxide electron transport layer in hybrid solar cell

Optik ◽  
2021 ◽  
pp. 168102
Author(s):  
Deboraj Muchahary ◽  
Kodam Priyanka ◽  
Lakum Sai Ram ◽  
Aarthi Prahitha ◽  
Sreedhar Kollem
Keyword(s):  
Solar Cell ◽  
Electron Transport ◽  
Metal Oxide ◽  
Performance Enhancement ◽  
Hybrid Solar Cell ◽  
Transport Layer ◽  
Electron Transport Layer

scholarly journals N-type metal-oxide electron transport layer for mesoscopic perovskite solar cells

2016 ◽  
Vol 59 (9) ◽  
pp. 757-768 ◽  
Author(s):  
Yuli Xiong ◽  
Tongfa Liu ◽  
Xixi Jiang ◽  
Yaoguang Rong ◽  
Hongwei Han
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Metal Oxide ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer
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