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A facile route to grain morphology controllable perovskite thin films towards highly efficient perovskite solar cells
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Kemi, Organisk kemi.
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Kemi, Tillämpad fysikalisk kemi.ORCID-id: 0000-0001-8084-1181
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Fiber- och polymerteknologi. KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Centra, Wallenberg Wood Science Center.ORCID-id: 0000-0002-1591-5815
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Teoretisk kemi och biologi.
Vise andre og tillknytning
2018 (engelsk)Inngår i: Nano Energy, ISSN 2211-2855, E-ISSN 2211-3282, Vol. 53, s. 405-414Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Perovskite photovoltaics have recently attracted extensive attention due to their unprecedented high power conversion efficiencies (PCEs) in combination with primitive manufacturing conditions. However, the inherent polycrystalline nature of perovskite films renders an exceptional density of structural defects, especially at the grain boundaries (GBs) and film surfaces, representing a key challenge that impedes the further performance improvement of perovskite solar cells (PSCs) and large solar module ambitions towards commercialization. Here, a novel strategy is presented utilizing a simple ethylammonium chloride (EACl) additive in combination with a facile solvent bathing approach to achieve high quality methyammonium lead iodide (MAPbI3) films. Well-oriented, micron-sized grains were observed, which contribute to an extended carrier lifetime and reduced trap density. Further investigations unraveled the distinctively prominent effects of EACl in modulating the perovskite film quality. The EACl was found to promote the perovskite grain growing without undergoing the formation of intermediate phases. Moreover, the EACl was also revealed to deplete at relative low temperature to enhance the film quality without compromising the beneficial bandgap for solar cell applications. This new strategy boosts the power conversion efficiency (PCE) to 20.9% and 19.0% for devices with effective areas of 0.126 cm2 and 1.020 cm2, respectively, with negligible current hysteresis and enhanced stability. Besides, perovskite films with a size of 10 × 10 cm2, and an assembled 16 cm2(5 × 5 cm2 module) perovskite solar module with a PCE of over 11% were constructed.

sted, utgiver, år, opplag, sider
2018. Vol. 53, s. 405-414
Emneord [en]
Perovskite solar cells, Ethylammonium chloride, Large grains, Additive engineering, Solvent bathing, Perovskite solar module
HSV kategori
Forskningsprogram
Kemi; Fysik
Identifikatorer
URN: urn:nbn:se:kth:diva-234552DOI: 10.1016/j.nanoen.2018.08.072ISI: 000448994600045Scopus ID: 2-s2.0-85052970311OAI: oai:DiVA.org:kth-234552DiVA, id: diva2:1246302
Merknad

QC 20180910

Tilgjengelig fra: 2018-09-07 Laget: 2018-09-07 Sist oppdatert: 2019-10-15bibliografisk kontrollert

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Zhang, FuguoCong, JiayanLi, YuanyuanBergstrand, JanLiu, HaichunHajian, AlirezaYao, ZhaoyangWang, LinqinHao, YanGardner, James M.Ågren, HansWidengren, JerkerKloo, LarsSun, Licheng
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