High efficiency and stability perovskite solar cells based on the functionalized charge transport layers

Informazioni relative al progetto

HES-PSC-FCTL

ID dell’accordo di sovvenzione: 839136

DOI

10.3030/839136

Progetto chiuso

Data della firma CE 10 Aprile 2019

Data di avvio 1 Agosto 2019

Data di completamento 31 Luglio 2021

Finanziato da

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Costo totale

€ 224 933,76

Contributo UE

€ 224 933,76

Coordinato da

UNIVERSITY OF SURREY
United Kingdom

Periodic Reporting for period 1 - HES-PSC-FCTL (High efficiency and stability perovskite solar cells based on the functionalized charge transport layers)

Periodo di rendicontazione: 2019-08-01 al 2021-07-31

Sintesi del contesto e degli obiettivi generali del progetto

Efficient and stable solar cell technology has become important means to solving the growing energy and environmental crisis. It has been found to be central to the high-efficiency solar cells that the judicious selection of appropriate charge transport layers. In this work, we fabricated a high-efficiency and stable inverted planar perovskite solar cell, which employed a Lanthanum (La)-doped BaSnO3 (LBSO) / graphene bi-layer as the electron transport layer. Based on “LBSO-template induced perovskite re-nucleation and crystal growth”, the stability and efficiency of our devices have been improved. Through this project, we find a new route to boost the charge carrier collection efficiency and enhance the stability of perovskite. These results are conducive to speeding up the process of the practical application of perovskite solar cells, thereby promoting the development and the application of clean energy.

Lavoro eseguito dall’inizio del progetto fino alla fine del periodo coperto dalla relazione e principali risultati finora ottenuti

In this two years project, we finished the five independent but close related work packages and reached the major milestones: 1) we optimized the nanoparticle particle size, doping concentration and film thickness of the bi-functional layer film, resulting in a 5% increase in device efficiency related to the reference solar cell (same batch). 2) The stability of the perovskite solar cells with the LBSO layer has been improved by keeping 95% initial efficiency after 800 h. That is four-time than that of the reference device. The LBSO-template induced perovskite re-nucleation and crystal growth enhanced the quality of the perovskite/transport layer interface. 3) The degradation mechanism of perovskite solar cells has been researched. Our result reveals the quality improvement of the interface can depress the device performance degradation. Part of the works has been published in top peer-review journals, such as Nano Energy (DOI: 10.1016/j.nanoen.2020.105249) Advanced Materials (DOI: 10.1002/adma.202006435) and Energy & environment materials (DOI: 10.1002/eem2.12231).

Progressi oltre lo stato dell’arte e potenziale impatto previsto (incluso l’impatto socioeconomico e le implicazioni sociali più ampie del progetto fino ad ora)

We found that the quality of the perovskite interface has an important influence on the performance of the devices, especially for stability. The interface improvement induced by the LBSO layer has been further verified and highlighted in the ageing test. Our research work provided a feasible technical route to improve the efficiency and stability of perovskite solar cells. This bi-functional LBSO layer can also be fabricated through a large-scale coating method (slot-die coating and blade coating), which can play an important role in the commercialisation of perovskite solar cells. We have communicated with well-known photovoltaic companies (Jinkosolar and CanadianSolar) on this technology and aroused their great interest. Although this project has ended, the researcher will continue to cooperate with collaborators to promote the industrialisation of project results.

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