研究目的
Investigating the role of the built-in potential in perovskite solar cells and its impact on charge collection and transport.
研究成果
A high enough built-in potential is crucial in perovskite solar cells to ensure efficient extraction of majority carriers within the charge transport layers and to avoid the reversal of the electric field inside the active layer under operating conditions. This study highlights the importance of optimizing the built-in potential and charge transport layers for enhancing the performance of perovskite solar cells.
研究不足
The study assumes idealized conditions in simulations, such as negligible interface recombination and uniform electric fields, which may not fully capture the complexity of real-world devices. Additionally, ionic effects were neglected in the simulations, which could influence the electric field distribution and charge transport in perovskite solar cells.
1：Experimental Design and Method Selection:
Phase-sensitive photocurrent measurements and theoretical device simulations based on the drift-diffusion framework were employed to investigate the role of the built-in electric field and charge-selective transport layers in perovskite solar cells.
2：Sample Selection and Data Sources:
State-of-the-art p–i–n perovskite solar cells with different types of hole transport layers (HTLs) and electron transport layers (ETLs) were fabricated and analyzed.
3：List of Experimental Equipment and Materials:
Prepatterned ITO glass or fused silica substrates, PolyTPD, PTAA, PFN-P2, perovskite solution, C60, LiF, BCP, copper, and various solvents and chemicals were used.
4：Experimental Procedures and Operational Workflow:
Devices were fabricated by spin coating and evaporation techniques, followed by current–voltage characteristics and photocurrent measurements under controlled illumination conditions.
5：Data Analysis Methods:
The experimental results were interpreted within an analytical framework and compared with numerical predictions from drift-diffusion simulations.
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Keithley 2400
2400
Keithley
Current–voltage characteristics measurement
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KEYSIGHT E5061B
E5061B
KEYSIGHT
Network analyzer for photocurrent measurements
-
Stanford research system (SR570)
SR570
Stanford research system
Amplifier for tuning LED's power
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ITO
15 ? sq?1
Automatic Research
Substrate for device fabrication
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PolyTPD
Ossila
Hole transport layer
-
PTAA
Sigma Aldrich
Hole transport layer
-
PFN-P2
Hole transport layer
-
C60
Creaphys
Electron transport layer
-
LiF
Electron transport layer
-
BCP
Sigma-Aldrich
Metal contact layer
-
Copper
Sigma-Aldrich
Metal contact layer
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Oriel class ABA solar simulator
class ABA
Oriel
Providing one sun illumination
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Si photodiode
Monitoring illumination intensity
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KG5 filtered silicon solar cell
KG5
Fraunhofer ISE
Calibration of sun simulator
-
Philips Projection Lamp
Type7724 12 V 100 W
Philips
Light source for EQE spectrum recording
-
Oriel Cornerstone 74100
74100
Oriel
Monochromator for EQE spectrum recording
-
EG&G Princeton Applied Research Model 5302
5302
EG&G Princeton Applied Research
Lock-in-amplifier for photogenerated current measurement
-
UV-enhanced Si photodetector
Newport
Calibration of lamp spectrum
-
CrystaLaser Nordic Combiner
CrystaLaser
Pump for background recombination level
-
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