New insight on the open‐circuit voltage of perovskite solar cells: The role of defect‐density distribution and electric field in the active layer

2020 ◽  
Author(s):  
Nazila Zarabinia ◽  
Reza Rasuli ◽  
Ezeddin Mohajerani
Keyword(s):  
Solar Cells ◽  
Electric Field ◽  
Density Distribution ◽  
Active Layer ◽  
Open Circuit Voltage ◽  
Defect Density ◽  
Perovskite Solar Cells ◽  
Open Circuit

scholarly journals Evaluating the role of phenethylamine iodide as a novel anti-solvent for enhancing performance of inverted planar perovskite solar cells

2020 ◽  
Vol 8 (21) ◽  
pp. 7143-7148
Author(s):  
Christos Zervos ◽  
Marinos Tountas ◽  
Konstantinos Chatzimanolis ◽  
Christos Polyzoidis ◽  
Emmanuel Kymakis
Keyword(s):  
Solar Cells ◽  
Open Circuit Voltage ◽  
Perovskite Solar Cells ◽  
Open Circuit ◽  
Post Treatment ◽  
Fabrication Process

An alternate use of PEAI for enhancing the performance of inverted perovskite solar cells is demonstrated, by employing it as an anti-solvent during the perovskite fabrication process. The results show an enhancement of the open-circuit voltage as compared to the PEAI post treatment.

scholarly journals Arylammonium-Assisted Reduction of the Open-Circuit Voltage Deficit in Wide-Bandgap Perovskite Solar Cells: The Role of Suppressed Ion Migration

2020 ◽  
Vol 5 (8) ◽  
pp. 2560-2568 ◽  
Author(s):  
Cong Chen ◽  
Zhaoning Song ◽  
Chuanxiao Xiao ◽  
Rasha A. Awni ◽  
Canglang Yao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Open Circuit Voltage ◽  
Perovskite Solar Cells ◽  
Wide Bandgap ◽  
Open Circuit ◽  
Ion Migration

scholarly journals Carrier trapping and recombination: the role of defect physics in enhancing the open circuit voltage of metal halide perovskite solar cells

2016 ◽  
Vol 9 (11) ◽  
pp. 3472-3481 ◽  
Author(s):  
Tomas Leijtens ◽  
Giles E. Eperon ◽  
Alex J. Barker ◽  
Giulia Grancini ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Time Scales ◽  
Open Circuit Voltage ◽  
Perovskite Solar Cells ◽  
Open Circuit ◽  
Metal Halide ◽  
Trapped Electrons ◽  
Metal Halide Perovskite ◽  
Halide Perovskite

We show that trapped electrons recombine with free holes unexpectedly slowly, on microsecond time scales, relaxing the limit on obtainable open circuit voltage.

Microcrystalline (Si,Ge):H Solar Cells

2003 ◽  
Vol 762 ◽  
Author(s):  
Jianhua Zhu ◽  
Vikram L. Dalal
Keyword(s):  
Solar Cells ◽  
Buffer Layer ◽  
Quantum Efficiency ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Defect Density ◽  
Cell Structure ◽  
Open Circuit ◽  
Base Layer ◽  
Ecr Plasma

AbstractWe report on the growth and properties of microcrystalline Si:H and (Si,Ge):H solar cells on stainless steel substrates. The solar cells were grown using a remote, low pressure ECR plasma system. In order to crystallize (Si,Ge), much higher hydrogen dilution (∼40:1) had to be used compared to the case for mc-Si:H, where a dilution of 10:1 was adequate for crystallization. The solar cell structure was of the p+nn+ type, with light entering the p+ layer. It was found that it was advantageous to use a thin a-Si:H buffer layer at the back of the cells in order to reduce shunt density and improve the performance of the cells. A graded gap buffer layer was used at the p+n interface so as to improve the open-circuit voltage and fill factor. The open circuit voltage and fill factor decreased as the Ge content increased. Quantum efficiency measurements indicated that the device was indeed microcrystalline and followed the absorption characteristics of crystalline ( Si,Ge). As the Ge content increased, quantum efficiency in the infrared increased. X-ray measurements of films indicated grain sizes of ∼ 10nm. EDAX measurements were used to measure the Ge content in the films and devices. Capacitance measurements at low frequencies ( ~100 Hz and 1 kHz) indicated that the base layer was indeed behaving as a crystalline material, with classical C(V) curves. The defect density varied between 1x1016 to 2x1017/cm3, with higher defects indicated as the Ge concentration increased.

Reducing recombination and enhancing open circuit voltage by Strontium-alloying in multiple cation perovskite solar cells

2017 ◽  
Author(s):  
Pietro Caprioglio ◽  
Fengshuo Zu ◽  
Christian M. Wolff ◽  
Martin Stolterfhot ◽  
Norbert Koch ◽  
...  
Keyword(s):  
Solar Cells ◽  
Open Circuit Voltage ◽  
Perovskite Solar Cells ◽  
Open Circuit
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