Lattice Strain Relaxation and Grain Homogenization for Efficient Inverted MAPbI3 Perovskite Solar Cells

2021 ◽  
pp. 4569-4575
Author(s):  
Chengbo Li ◽  
Jie Hu ◽  
Shurong Wang ◽  
Jing Ren ◽  
Bin Chen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Lattice Strain ◽  
Strain Relaxation ◽  
Perovskite Solar Cells

Impact of strain relaxation on performance of α-formamidinium lead iodide perovskite solar cells

Science ◽  
2020 ◽  
Vol 370 (6512) ◽  
pp. 108-112 ◽  
Author(s):  
Gwisu Kim ◽  
Hanul Min ◽  
Kyoung Su Lee ◽  
Do Yoon Lee ◽  
So Me Yoon ◽  
...  
Keyword(s):  
Solar Cells ◽  
Lattice Strain ◽  
Urbach Energy ◽  
High Efficiency ◽  
Strain Relaxation ◽  
Perovskite Solar Cells ◽  
Lead Iodide ◽  
Α Phase ◽  
Carrier Trap ◽  
Lead Halide

High-efficiency lead halide perovskite solar cells (PSCs) have been fabricated with α-phase formamidinium lead iodide (FAPbI3) stabilized with multiple cations. The alloyed cations greatly affect the bandgap, carrier dynamics, and stability, as well as lattice strain that creates unwanted carrier trap sites. We substituted cesium (Cs) and methylenediammonium (MDA) cations in FA sites of FAPbI3 and found that 0.03 mol fraction of both MDA and Cs cations lowered lattice strain, which increased carrier lifetime and reduced Urbach energy and defect concentration. The best-performing PSC exhibited power conversion efficiency >25% under 100 milliwatt per square centimeter AM 1.5G illumination (24.4% certified efficiency). Unencapsulated devices maintained >80% of their initial efficiency after 1300 hours in the dark at 85°C.

Relationship between Lattice Strain and Efficiency for Sn-Perovskite Solar Cells

2019 ◽  
Vol 11 (34) ◽  
pp. 31105-31110 ◽  
Author(s):  
Kohei Nishimura ◽  
Daisuke Hirotani ◽  
Muhammad Akmal Kamarudin ◽  
Qing Shen ◽  
Taro Toyoda ◽  
...  
Keyword(s):  
Solar Cells ◽  
Lattice Strain ◽  
Perovskite Solar Cells

Strain Relaxation and Light Management in Tin–Lead Perovskite Solar Cells to Achieve High Efficiencies

2019 ◽  
Vol 4 (8) ◽  
pp. 1991-1998 ◽  
Author(s):  
Gaurav Kapil ◽  
Takeru Bessho ◽  
Chi Huey Ng ◽  
Kengo Hamada ◽  
Manish Pandey ◽  
...  
Keyword(s):  
Solar Cells ◽  
Strain Relaxation ◽  
Perovskite Solar Cells ◽  
Light Management

Divalent hard Lewis acid doped CsPbBr3 films for 9.63%-efficiency and ultra-stable all-inorganic perovskite solar cells

2019 ◽  
Vol 7 (12) ◽  
pp. 6877-6882 ◽  
Author(s):  
Yuanyuan Zhao ◽  
Yudi Wang ◽  
Jialong Duan ◽  
Xiya Yang ◽  
Qunwei Tang
Keyword(s):  
Solar Cells ◽  
Energy Distribution ◽  
Crystal Lattice ◽  
Lewis Acid ◽  
Formation Energy ◽  
Lattice Strain ◽  
Perovskite Solar Cells ◽  
Bandgap Energy ◽  
Inorganic Perovskite

Substitution of Pb2+ sites with smaller isovalent ions is used to optimize the crystal lattice of inorganic CsPbBr3 perovskite through releasing lattice strain, increasing the formation energy of vacancies and tuning the bandgap energy distribution.

Relationship between Relative Lattice Strain and Efficiency for Sn-Perovskite Solar Cells

2019 ◽  
Author(s):  
Shuzi Hayase ◽  
Kohei Nishimura ◽  
Gaurav Kapil ◽  
Chi Huey Ng ◽  
Kengo Hamada ◽  
...  
Keyword(s):  
Solar Cells ◽  
Lattice Strain ◽  
Perovskite Solar Cells

In situ observation of δ phase suppression by lattice strain in all-inorganic perovskite solar cells

Nano Energy ◽  
2020 ◽  
Vol 73 ◽  
pp. 104803 ◽  
Author(s):  
Wei Hui ◽  
Ying Xu ◽  
Fei Xia ◽  
Hui Lu ◽  
Bixin Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Lattice Strain ◽  
Perovskite Solar Cells ◽  
In Situ Observation ◽  
Inorganic Perovskite ◽  
Δ Phase

scholarly journals Minimizing Defect States in Lead Halide Perovskite Solar Cell Materials

2020 ◽  
Vol 10 (9) ◽  
pp. 3061 ◽  
Author(s):  
Rosa Brakkee ◽  
René M. Williams
Keyword(s):  
Band Gap ◽  
Chemical Bonding ◽  
Lattice Strain ◽  
Strain Relaxation ◽  
Perovskite Solar Cells ◽  
Vacancy Formation ◽  
Rational Approach ◽  
Computational Studies ◽  
Defect States ◽  
Halide Perovskite

In order to reach the theoretical efficiency limits of lead-based metal halide perovskite solar cells, the voltage should be enhanced because it suffers from non-radiative recombination. Perovskite materials contain intrinsic defects that can act as Shockley–Read–Hall recombination centers. Several experimental and computational studies have characterized such defect states within the band gap. We give a systematic overview of compositional engineering by distinguishing the different defect-reducing mechanisms. Doping effects are divided into influences on: (1) crystallization; (2) lattice properties. Incorporation of dopant influences the lattice properties by: (a) lattice strain relaxation; (b) chemical bonding enhancement; (c) band gap tuning. The intrinsic lattice strain in undoped perovskite was shown to induce vacancy formation. The incorporation of smaller ions, such as Cl, F and Cd, increases the energy for vacancy formation. Zn doping is reported to induce strain relaxation but also to enhance the chemical bonding. The combination of computational studies using (DFT) calculations quantifying and qualifying the defect-reducing propensities of different dopants with experimental studies is essential for a deeper understanding and unraveling insights, such as the dynamics of iodine vacancies and the photochemistry of the iodine interstitials, and can eventually lead to a more rational approach in the search for optimal photovoltaic materials.

Microstructure and Lattice Strain Control towards High-Performance Ambient Green-Printed Perovskite Solar Cells

2021 ◽  
Author(s):  
junjie fang ◽  
Zicheng Ding ◽  
Xiaoming Chang ◽  
Jing Lu ◽  
Tinghuan Yang ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Lattice Strain ◽  
Perovskite Solar Cells ◽  
Strain Control ◽  
Solution Processed ◽  
Great Progress

Solution-processed perovskite solar cells (PSCs) have made great progress in past years. However, most fabrication methods of PSCs in lab cannot be directly transferred to industrial printing, and the toxic...

scholarly journals Ion migration drives self-passivation in perovskite solar cells and is enhanced by light soaking

RSC Advances ◽  
2021 ◽  
Vol 11 (20) ◽  
pp. 12095-12101
Author(s):  
Bart Roose
Keyword(s):  
Solar Cells ◽  
Crack Formation ◽  
Strain Relaxation ◽  
Perovskite Solar Cells ◽  
Ion Migration ◽  
Halide Perovskite ◽  
Lead Halide

Ion migration can assist self-passivation and strain relaxation in lead halide perovskite films, while restriction of ion migration can lead to crack formation. Light soaking increases ion migration, allowing self-passivation and strain relaxation.

A thiourea additive-based quadruple cation lead halide perovskite with an ultra-large grain size for efficient perovskite solar cells

Nanoscale ◽  
2019 ◽  
Vol 11 (45) ◽  
pp. 21824-21833 ◽  
Author(s):  
Jyoti V. Patil ◽  
Sawanta S. Mali ◽  
Chang Kook Hong
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Inorganic Perovskite ◽  
Halide Perovskite ◽  
Lead Halide

Controlling the grain size of the organic–inorganic perovskite thin films using thiourea additives now crossing 2 μm size with >20% power conversion efficiency.

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