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Article: Stabilizing n-type hetero-junctions for NiOx based inverted planar perovskite solar cells with an efficiency of 21.6%
Title | Stabilizing n-type hetero-junctions for NiOx based inverted planar perovskite solar cells with an efficiency of 21.6% |
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Authors | |
Keywords | Cadmium compounds Efficiency Heterojunctions Metals Nickel oxide |
Issue Date | 2020 |
Publisher | RSC Publications. The Journal's web site is located at http://pubs.rsc.org/en/journals/journalissues/ta#!recentarticles&all |
Citation | Journal of Materials Chemistry A, 2020, v. 8 n. 4, p. 1865-1874 How to Cite? |
Abstract | The performance and stability of inverted perovskite solar cells (PSC), in particular, those with stable metal oxide hole transport layers, are limited by the instability of perovskite/electron transport layer heterojunctions. In this work, we demonstrate a successful strategy for passivating and stabilizing the perovskite/electronic transport layer n-type heterojunction in a nickel oxide based inverted planar PSC by using chemically stable inorganic CdxZn1−xSeyS1−y quantum dots (QDs). Experimental and theoretical results demonstrate that the defects/traps (unsaturated Pb2+ and mobile iodine ions) on perovskite surfaces can be substantially suppressed by the QDs, leading to a significant reduction of interfacial recombination and more stable n-type heterojunction. Consequently, a significant enhancement of the open-circuit voltage from 1.075 V to 1.162 V and power conversion efficiency from 19.47% to 21.63% is achieved for the QD passivated perovskite-based devices. We also demonstrate that the stabilized n-type hetero-junction results in a dramatic improvement of long-term and operational device stability. Our work demonstrates an effective and simple way to stabilize the perovskite/electron transport layer interface to develop high efficiency stable inverted planar PSCs, which will bring these devices closer to future commercial applications. |
Persistent Identifier | http://hdl.handle.net/10722/281240 |
ISSN | 2021 Impact Factor: 14.511 2020 SCImago Journal Rankings: 3.637 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Chen, W | - |
dc.contributor.author | Pang, G-T | - |
dc.contributor.author | Zhou, Y-C | - |
dc.contributor.author | Sun, Y-Z | - |
dc.contributor.author | Liu, F-Z | - |
dc.contributor.author | Chen, R | - |
dc.contributor.author | Chen, S-M | - |
dc.contributor.author | Djurisic, AB | - |
dc.contributor.author | He, Z-B | - |
dc.date.accessioned | 2020-03-09T09:52:00Z | - |
dc.date.available | 2020-03-09T09:52:00Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Journal of Materials Chemistry A, 2020, v. 8 n. 4, p. 1865-1874 | - |
dc.identifier.issn | 2050-7488 | - |
dc.identifier.uri | http://hdl.handle.net/10722/281240 | - |
dc.description.abstract | The performance and stability of inverted perovskite solar cells (PSC), in particular, those with stable metal oxide hole transport layers, are limited by the instability of perovskite/electron transport layer heterojunctions. In this work, we demonstrate a successful strategy for passivating and stabilizing the perovskite/electronic transport layer n-type heterojunction in a nickel oxide based inverted planar PSC by using chemically stable inorganic CdxZn1−xSeyS1−y quantum dots (QDs). Experimental and theoretical results demonstrate that the defects/traps (unsaturated Pb2+ and mobile iodine ions) on perovskite surfaces can be substantially suppressed by the QDs, leading to a significant reduction of interfacial recombination and more stable n-type heterojunction. Consequently, a significant enhancement of the open-circuit voltage from 1.075 V to 1.162 V and power conversion efficiency from 19.47% to 21.63% is achieved for the QD passivated perovskite-based devices. We also demonstrate that the stabilized n-type hetero-junction results in a dramatic improvement of long-term and operational device stability. Our work demonstrates an effective and simple way to stabilize the perovskite/electron transport layer interface to develop high efficiency stable inverted planar PSCs, which will bring these devices closer to future commercial applications. | - |
dc.language | eng | - |
dc.publisher | RSC Publications. The Journal's web site is located at http://pubs.rsc.org/en/journals/journalissues/ta#!recentarticles&all | - |
dc.relation.ispartof | Journal of Materials Chemistry A | - |
dc.subject | Cadmium compounds | - |
dc.subject | Efficiency | - |
dc.subject | Heterojunctions | - |
dc.subject | Metals | - |
dc.subject | Nickel oxide | - |
dc.title | Stabilizing n-type hetero-junctions for NiOx based inverted planar perovskite solar cells with an efficiency of 21.6% | - |
dc.type | Article | - |
dc.identifier.email | Liu, F-Z: liufz@hku.hk | - |
dc.identifier.email | Djurisic, AB: dalek@hku.hk | - |
dc.identifier.authority | Djurisic, AB=rp00690 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1039/C9TA12368G | - |
dc.identifier.scopus | eid_2-s2.0-85078670214 | - |
dc.identifier.hkuros | 309256 | - |
dc.identifier.volume | 8 | - |
dc.identifier.issue | 4 | - |
dc.identifier.spage | 1865 | - |
dc.identifier.epage | 1874 | - |
dc.identifier.isi | WOS:000511170800028 | - |
dc.publisher.place | United Kingdom | - |
dc.identifier.issnl | 2050-7496 | - |