MISiS: Perovskite solar photomodules

The main articles are:

• Halide perovskites
• Solar Power (Global Market)
• Solar power (Russian market)

2023: Announcement of Perovskite Solar Photomodules

Young scientists NITU MISIS developed a prototype of a perovskite solar cell with a duration of 3500 hours, and also scaled it to a photo module. Such results were achieved by the use of chlorine alloying additives in the composition of an absorbing perovskite thin film. Already in February 2023, prototypes can be used in the form of compact power supplies for low-power electronics. According to the researchers, the prototype is ready for field tests and pilot testing. The results of the study are published in the journal Solar RRL. This was announced on February 6, 2023 by representatives of NUST MISIS.

Perovskite solar photomodules

As reported, perovskite photocells are a dynamically developing next-generation solar cell technology. Thin film devices of this type have a number of additional features in comparison with traditional silicon ones: they are cheaper to manufacture, have flexibility, since it is possible to make them on plastic substrates. Due to this, such photo modules can be mounted on building walls and curved surfaces of car windows. However, rapid corrosion processes occur in perovskite solar cells.

Scientists and engineers have learned to make efficient photocells with an efficiency of about 25%, which is comparable to silicon counterparts, and sometimes superior to silicon samples, they are still short-lived. The main problem is the chemical interaction of the absorbing hybrid perovskite layer with the charge-transport layers. They are located at the top and bottom of the active perovskite layer and provide separation of charge carriers: energy electronic levels are selected so that one layer passes only electrons, and the other - only holes (quasi-particles of positive charge carriers in semiconductors).

Scientists at the University of Science and Technology MISIS have revealed that the use of chlorine alloying additives in perovskite thin film leads not only to an increase in instrument characteristics - to achieve efficiency in the 20.1%, but also to increase the durability of work for 3500 hours. The result was confirmed by scaling the samples to 25 cm2 industrial prototypes.

Perovskite solar photomodules

If we consider only the photoactive perovskite layer, then the introduction of chlorine does not lead to the stabilization of the structure of thin films under the influence of degradation factors. However, the use of doped layers in the architecture of the solar cell significantly extends the service life in light intensity and heating. Thus, a metastable state of the device is achieved, in which electrochemical corrosion processes occur, but their dynamics is significantly reduced. told Danila Saranin, co-author of the work, deputy head of the laboratory of Promising Solar power at MISIS University

The researchers also presented prototypes of photo modules (widescreen devices) and clearly showed that the use of the proposed approach has efficacy and relevance not only in the form of laboratory samples, that is, small devices of exclusively scientific value, but also in industrial prototypes, which can already bring practical benefits in the form of compact power supplies and low-power electronics (ecosystems of IoT devices - the Internet of Things, sensors, mobile gadgets).

According to scientists, during the study, interdisciplinary work was carried out in which a comprehensive study of the modes of operation of the solar battery was combined with an analysis of the corrosion of thin films.