scholarly journals Time-resolved HAXPES using a microfocused XFEL beam: From vacuum space-charge effects to intrinsic charge-carrier recombination dynamics

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Lars-Philip Oloff ◽  
Ashish Chainani ◽  
Masaharu Matsunami ◽  
Kazutoshi Takahashi ◽  
Tadashi Togashi ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Space Charge ◽  
Space Charge Effects ◽  
Time Resolved ◽  
Charge Effects ◽  
Carrier Recombination ◽  
Charge Carrier Recombination ◽  
Vacuum Space ◽  
Recombination Dynamics

scholarly journals Perovskite Solar Cells Yielding Reproducible Photovoltage of 1.20 V

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Essa A. Alharbi ◽  
M. Ibrahim Dar ◽  
Neha Arora ◽  
Mohammad Hayal Alotaibi ◽  
Yahya A. Alzhrani ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Carrier ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Nonradiative Recombination ◽  
Time Resolved ◽  
Carrier Recombination ◽  
Absorber Material ◽  
Charge Carrier Recombination ◽  
Conversion Efficiencies

High photovoltages and power conversion efficiencies of perovskite solar cells (PSCs) can be realized by controlling the undesired nonradiative charge carrier recombination. Here, we introduce a judicious amount of guanidinium iodide into mixed-cation and mixed-halide perovskite films to suppress the parasitic charge carrier recombination, which enabled the fabrication of >20% efficient and operationally stable PSCs yielding reproducible photovoltage as high as 1.20 V. By introducing guanidinium iodide into the perovskite precursor solution, the bandgap of the resulting absorber material changed minimally; however, the nonradiative recombination diminished considerably as revealed by time-resolved photoluminescence and electroluminescence studies. Furthermore, using capacitance-frequency measurements, we were able to correlate the hysteresis features exhibited by the PSCs with interfacial charge accumulation. This study opens up a path to realize new record efficiencies for PSCs based on guanidinium iodide doped perovskite films.

scholarly journals Perovskite Solar Cells Yielding Reproducible Photovoltage of 1.20 V

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Essa A. Alharbi ◽  
M. Ibrahim Dar ◽  
Neha Arora ◽  
Mohammad Hayal Alotaibi ◽  
Yahya A. Alzhrani ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Carrier ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Nonradiative Recombination ◽  
Time Resolved ◽  
Carrier Recombination ◽  
Absorber Material ◽  
Charge Carrier Recombination ◽  
Conversion Efficiencies

High photovoltages and power conversion efficiencies of perovskite solar cells (PSCs) can be realized by controlling the undesired nonradiative charge carrier recombination. Here, we introduce a judicious amount of guanidinium iodide into mixed-cation and mixed-halide perovskite films to suppress the parasitic charge carrier recombination, which enabled the fabrication of >20% efficient and operationally stable PSCs yielding reproducible photovoltage as high as 1.20 V. By introducing guanidinium iodide into the perovskite precursor solution, the bandgap of the resulting absorber material changed minimally; however, the nonradiative recombination diminished considerably as revealed by time-resolved photoluminescence and electroluminescence studies. Furthermore, using capacitance-frequency measurements, we were able to correlate the hysteresis features exhibited by the PSCs with interfacial charge accumulation. This study opens up a path to realize new record efficiencies for PSCs based on guanidinium iodide doped perovskite films.

Vacuum space-charge effects in nano-ARPES

2012 ◽  
Vol 85 (7) ◽  
Author(s):  
S. Hellmann ◽  
T. Ott ◽  
L. Kipp ◽  
K. Rossnagel
Keyword(s):  
Space Charge ◽  
Space Charge Effects ◽  
Charge Effects ◽  
Vacuum Space

Time-resolved microwave technique for ultrafast charge-carrier recombination time measurements in diamonds and GaAs

1999 ◽  
Vol 74 (12) ◽  
pp. 1731-1733 ◽  
Author(s):  
S. V. Garnov ◽  
A. I. Ritus ◽  
S. M. Klimentov ◽  
S. M. Pimenov ◽  
V. I. Konov ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Time Resolved ◽  
Recombination Time ◽  
Microwave Technique ◽  
Carrier Recombination ◽  
Charge Carrier Recombination

scholarly journals Time-resolved HAXPES at SACLA: probe and pump pulse-induced space-charge effects

2014 ◽  
Vol 16 (12) ◽  
pp. 123045 ◽  
Author(s):  
L-P Oloff ◽  
M Oura ◽  
K Rossnagel ◽  
A Chainani ◽  
M Matsunami ◽  
...  
Keyword(s):  
Space Charge ◽  
Pump Pulse ◽  
Space Charge Effects ◽  
Time Resolved ◽  
Charge Effects
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