Today, novel and innovative concepts such as hybrid organic inorganic perovskite (HOIPs)-based photovoltaics/optoelectronics are emerging, allowing for radically new device applications with high economic prospects. Promising spintronic device concepts are based on the unique spin-related optoelectronic properties of HOIPs which includes the strong spin-orbit coupling (SOC), large-scale Rashba splitting, magneto-optical effect, a large Stark effect, triplet formation and polarized light-related effects. These behaviours offer the possibilities of developing new ways to control the performance of integrated optoelectronic devices through spin interactions between the photons and electrons. These studies could find applications ranging from high-density data storage to nano scale magnetic sensors for biotech and health applications. As a basis for all future applications, industry requires reliable measurement capabilities. Here, the SOC, Rashba effect and spin-degeneracy are explicitly listed as specific challenges for spin-HOIPs that need advanced scientific characterizations. More recently, a new branch of spintronics based on HOIPs has evolved, called spin-optoelectronics, being a combination of photons, spin and electrons. Combinations of spin-electron and spin-photon based SOC, Rashba and magnetic-optic effects are allowing new device concepts with promising applications. However, many of these theoretical concepts are yet to be tested experimentally, and there is therefore a scientific need to test and validate theoretical predictions. Since, we need to develop metrology tools and methods for reliable measurements to enable future applications.
The societal implications of these studies are profound. The potential applications span a wide range, from high-density data storage to nano-scale magnetic sensors for biotech and health applications. As society increasingly relies on advanced technologies for data storage, healthcare, and scientific advancements, the outcomes of these studies could have far-reaching effects on our daily lives.
However, for these innovations to be integrated into practical applications, reliable measurement capabilities are crucial for industry. Specific challenges, such as spin-orbit coupling, Rashba effects, and spin-degeneracy, need advanced scientific characterizations to ensure the robustness and viability of future applications. The development of metrology tools and methods becomes a societal imperative to facilitate the translation of theoretical concepts into tangible technologies that can benefit various sectors.
The main goals of this SpinPVK project are to observe the Rashba effect in HOIP spin-photovoltaic devices by magnetic current measurement under light illuminations. Scientific and technical specific objectives: This project addresses fundamental research and enabling metrology
for studying photon induced spintronics behaviour in HOIPs spin-based devices with the following specific objectives:
✓ To obtain the high magneto-current and improve photovoltaic performance in 2D/3D HOIP by altering the magnetization configuration of the two ferro-magnetic electrodes from parallel to antiparallel (spin-PV).
✓ To study the spin splitting (Rashba) of 2D/3D HOIP observed from the helicity-dependent steady state photocurrent by using the circular photogalvanic effect (CPGE).
✓ To enhance the magnetoconductivity (~ open circuit voltage) by the effect of controlled light intensities (Spin- LED).
✓ To reduce the pinholes, impurities, traps and to improve the spin transport in HOIPs by decreasing the magnetoresistance (SV-GMR)
