H2020Индивидуална стипендия2018–2020

TinPSC · Towards Stable and Highly Efficient Tin-based Perovskite Solar Cells

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2018-08-01 → 2020-07-31
Финансиране от ЕС: 185 857 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Слънчевите панели от перовскити се изследват чрез замяна на токсичния олово с калай или чрез използване на двойни перовскити като Cs2AgBiBr6. Това помага за създаването на по-безопасни и устойчиви на топлина и влага фотоволтаици.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Towards Stable and Highly Efficient Tin-based Perovskite Solar Cells

Solar cells are considered as one of the most promising renewable energy resources that can meet growing energy demand and mitigate greenhouse gas emissions. Impressively, solution-processed lead halide perovskites have attracted a great deal of attention in photovoltaic applications with an incredible device efficiency improvement from 3.8% to 25.2% during the past ten years. Unfortunately, these perovskite devices suffer from the toxicity of Pb and poor stability against moisture and heat, which are key challenges hindering their practical applications. Issue 1: Toxicity of Lead-based perovskites. It is prospective to replace Pb with less toxic Sn, since both Sn and Pb elements belong to the IVA group and they have similar ionic radii due to relativistic effects (Sn2+ 1.35Å and Pb2+ 1.49Å). However, the poor stability limits their progress and high efficiency of solar cells. Meanwhile, we found another more promising material-double perovskites with the formula of A2M+M3+X6, which can be formed by substituting divalent Pb2+ cations with a combination of non-toxic monovalent M+ and trivalent M3+ cations, are promising as lead-free photovoltaic materials. They possess a three-dimensional crystal structure similar to lead-based perovskites, and good stability against moisture and heat. Currently, the large bandgap limits its photovoltaic application with high efficiency. Therefore, in this project, we focus on both Sn-based perovskites and the benchmark double perovskite, Cs2AgBiBr6. Issue 2: Unstable organic hole transport materials (HTMs). Transport layers are crucial for achieving high-efficiency optoelectronic devices by promoting efficient selective carriers collection or injection. Organic semiconductors are attractive as transport materials with advantages of amorphous, light, flexible, good solubility in organic solvents, and easy to the solution process. Due to the low intrinsic carrier concentration of most organic transport materials, dopants are conventionally required to improve their carrier mobility and facilitate the carrier transfer. For example, LiTFSI and tBP are typical dopants for spiro-OMeTAD HTMs in high-efficiency solar cells. However, they still present a few challenges: 1) the need of a long-post oxidization process (around 10-24 hours) increases the production cycle of devices, 2) the poor stability of dopants leads to the poor long-term stability of devices. The overall objectives are 1) to improve the stability of Sn-based perovskites, 2) enhance the absorption properties of Cs2AgBiBr6, and 3) to develop stable HTMs for devices with high efficiency.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

Developing new energy sources is an urgent issue, as fossil fuels will be exhausted in near future. Solar cells system is a promising renewable energy technology that converts sunlight to electricity. Today, crystalline silicon exhibits high power conversion efficiencies (PCE) and dominates the solar panel industry. The problem of silicon solar cells is that it suffers from high production cost due to tedious processing condition. Recently, organic-lead-halide perovskites have offered the promise of a breakthrough for next-generation solar cell devices, and the PCE is up to 22.6% over the past few years. In spite of high efficiency, the presence of toxic lead (Pb) will become problematic in the future for widespread deployment of this technology. It is prospective to replace Pb with less toxic tin (Sn). However, the poor stability (the easily oxidization of Sn2+ to Sn4+ by O2) and low efficiency are two major issues of Sn-based perovskites. This proposal targets air-stable, high efficient Sn-based perovskite solar cells by developing new Sn-based perovskites and electron transporting layer to match the band energy of perovskites. The expected fruits of the project will contribute to European excellence and competiveness in renewable energy field. The successful transfer of the results will promote economic growth and job supplies. In addition to the scientific objectives, the proposal will help the fellow to new acquire knowledge and reinforce his quality as an independent researcher, such as creativity, independent thinking, leadership and transfer qualities, which are critical for the fellow to secure a long-term position in a European university/institution, and eventually become a world renowned expert in the energy research field.

Оригинален текст от CORDIS (на английски).

Участници

LINKOPINGS UNIVERSITET · LinkopingКоординаторШвеция