H2020Индивидуална стипендия2015–2017

NANOSOLAR · HYBRID QUANTUM-DOT/TWO-DIMENSIONAL MATERIALS PHOTOVOLTAIC CELLS

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

Период: 2015-06-02 → 2017-06-01
Финансиране от ЕС: 158 122 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Хибридни слънчеви клетки, съчетаващи квантови точки и двуизмерни материали като графена, се тестват за по-ефективно улавяне на светлината. Това помага за създаването на по-евтини и ефективни панели, които да намалят разходите за чиста енергия.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

HYBRID QUANTUM-DOT/TWO-DIMENSIONAL MATERIALS PHOTOVOLTAIC CELLS

Solar energy is the most important energy source on Earth and the natural choice for renewable and environmentally safe energy. In one year the Earth receives 3,850,000 exajoules, orders of magnitude more than the annual global human energy consumption of 550 exajoules in 2010. However, the cost of solar energy is still higher than carbon-based and nuclear energy mainly due to the high cost of crystalline silicon used in commercial solar cells. Therefore, developing higher-efficiency solar cells with lower cost materials is an important requirement for clean and sustainable energy. The objective of the project was to combine the remarkable optical and electronic properties of two-dimensional (2-D) materials and semiconducting quantum dots (QDs) to obtain higher photovoltaic efficiencies. QDs have excellent light absorption that can be tuned and optimized for sunlight spectrum. In the case of 2-D atomic materials (e.g. graphene, MoS2), they are semi-transparent, with high charge mobility and strong optoelectronic properties. The key idea behind this proposal is combining the advantages of these materials into a hybrid 2-D/QD solar cell to fully exploit the properties of these materials for solar energy photovoltaic harvesting. In this project, we set two specific objectives: 1) Study graphene as a layer to enhance the current collection at the interface between the quantum dots and the metallic electrode, and 2) Develop a novel architecture hybrid solar cells with a Graphene/QuantumDots/Graphene configuration, using QDs as light absorbers and graphene as charge extractor and electric conductor. Our results concluded that graphene can enhance the current collection since we observed an increase in the short circuit current from 14 mA/cm2 to 18 mA/cm2. The power efficiency increase using graphene is from 4.5% to 5.5%.

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

Цел на проекта

The development of high-efficiency and low-cost solar cells is one of the most crucial challenges to secure a clean and sustainable energy source. The novel and tunable optoelectronic properties of nanomaterials are a very promising but still challenging route to achieve this goal. In this project, we propose to combine the advantages of two important nanoscale materials, semiconductor quantum dots (QD) and two-dimensional atomic layered (2-D) materials, to realize high-efficiency hybrid solar cells. Quantum dots are one of the best absorbing and carrier photogenerators due to multiple exciton generation and their size-tunable and direct band gap, however, their poor dot-to-dot conductivity has been a major limitation for photovoltaic devices. We propose to overcome this limitation by intercalating 2-D materials that have shown high charge mobility and strong optoelectronic properties. We propose a tandem configuration based on a stack of QD layers for strong carrier photogeneration, with intercalated 2-D atomic layers for efficient charge and photocurrent extraction. We will study the charge transfer and separation at the interface of QDs and 2-D layers, both of which are strongly affected by quantum confinement. The co-supervisors of this project, Prof. Konstantatos and Prof. Koppens at ICFO, have demonstrated a QD/2-D(graphene) phototransistor with a photoresponse up to 5 orders of magnitude higher than phototransistors based on single graphene or MoS2 atomic layers without QDs, showing the potential of QD/2-D hybrid devices for photovoltaics. In addition to QDs, we will also use small band gap materials, such as phosphorene and other 2-D semiconductors that can harvest energy from infrared hot sources in dark conditions. The proposed hybrid QD/2-D solar cell architecture can have a strong technological impact since both materials can be produced in large scale by chemical synthesis and surpass the performance of current photovoltaic technologies.

Оригинален текст от CORDIS (на английски).

Участници

FUNDACIO INSTITUT DE CIENCIES FOTONIQUES · CastelldefelsКоординаторИспания