A5012846648- Perovskite Materials and Applications
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Semiconductor Lasers and Optical Devices
- Chalcogenide Semiconductor Thin Films
- Solid-state spectroscopy and crystallography
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Advanced MEMS and NEMS Technologies
- Nanowire Synthesis and Applications
- 2D Materials and Applications
- Organic and Molecular Conductors Research
- Silicon and Solar Cell Technologies
- Laser Material Processing Techniques
- Thin-Film Transistor Technologies
- Transition Metal Oxide Nanomaterials
- Silicon Nanostructures and Photoluminescence
Helmholtz-Zentrum Berlin für Materialien und Energie
2019-2023
Daily temperature variations induce phase transitions and lattice strains in halide perovskites, challenging their stability solar cells. We stabilized the perovskite black improved cell performance using ordered dipolar structure of β-poly(1,1-difluoroethylene) to control film crystallization energy alignment. demonstrated p-i-n cells with a record power conversion efficiency 24.6% over 18 square millimeters 23.1% 1 centimeter, which retained 96 88% after 1000 hours 1-sun maximum point...
Tuning the energy levels of halide perovskite by controlling deposition dipolar self-assembled monolayers.
In perovskite solar cells (PSCs) energy level alignment and charge extraction at the interfaces are essential factors directly affecting device performance. this work, we present a modified interface between all-inorganic CsPbI3 its hole-selective contact (spiro-OMeTAD), realized by dipole molecule trioctylphosphine oxide (TOPO), to align levels. On passivated film, with n-octylammonium iodide (OAI), created an upward surface band-bending TOPO treatment. This improved induces better enhances...
Perovskite solar cells are among the most exciting photovoltaic systems as they combine low recombination losses, ease of fabrication, and high spectral tunability. The Achilles heel this technology is device stability due to ionic nature perovskite crystal, rendering it highly hygroscopic, extensive diffusion ions especially at increased temperatures. Herein, we demonstrate application a simple solution-processed perfluorinated self-assembled monolayer (p-SAM) that not only enhances cell...
Phenothiazine (PTZ)-based materials have recently received considerable interest owing to their intriguing optoelectronic properties, low-cost, versatility of functionalization, and commercial availability.
Abstract Interfaces play a crucial role in determining perovskite solar cells, (PSCs) performance and stability. It is therefore of great importance to constantly work toward improving their design. This study shows the advantages using hole‐transport material (HTM) that can anchor surface through halogen bonding (XB). A halo‐functional HTM (PFI) compared reference (PF), identical optoelectronic properties chemical structure but lacking ability form XB. The interaction between PFI supported...
Perovskites have lately attracted a lot of attention as promising materials for the next-generation efficient, low-cost, and solution processable optoelectronics. Their complex transient photophysics, in time scales ranging from femtoseconds to seconds, been widely investigated. However, most reported works spectral window ultrafast absorption (TA) spectroscopy perovskite films is limited visible region, hence missing crucial information coming near-infrared (NIR). Furthermore, measured TA...
We have developed a new noninvasive optical method for monitoring charge carrier diffusion and mobility in semiconductor thin films the direction perpendicular to surface which is most relevant devices. The based on standard transient absorption measurements carried out reflectance transmittance modes at wavelengths below band gap where response mainly determined by change refractive index, turn depends distribution of photogenerated carriers across film. This initially inhomogeneous because...
Abstract Hybrid organic–inorganic halide perovskites (HOIHPs) have recently emerged as a flourishing area of research. Their easy and low‐cost production their unique optoelectronic properties make them promising materials for many applications. In particular, HOIHPs hold great potential next‐generation solar cells. However, practical implementation is still hindered by poor stability in air moisture, which responsible short lifetime. Optimizing the chemical composition exploiting...
In perovskite solar cells (PSCs) energy levels alignment and charge extraction at the interfaces are essential factors directly affecting device performance. this work, we present a modified interface between all-inorganic CsPbI$_3$ its hole selective contact (Spiro-OMeTAD), realized by dipole molecule trioctylphosphine oxide (TOPO), to align levels. On passivated film, n-Octyl ammonium Iodide (OAI), created an upward surface band-bending TOPO treatment. This improved induces better level...