Construction of an Iodine Diffusion Barrier Using Network Structure Silicone Resin for Stable Perovskite Solar CellsShow others and affiliations
2021 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 13, no 7, p. 8138-8146Article in journal (Refereed) Published
Abstract [en]
Long-term stability of organic-inorganic hybrid perovskite solar cells (PSCs) is inhibited by ion diffusion. Herein, we introduce a thermally stable and hydrophobic silicone resin layer with a network structure as an interfacial layer between the perovskite and the hole-transporting layer ( HTL). Experimental and theoretical investigations confirm that the small Si-O-Si unit in the network forms both Si-I and Pb-O bonds with the perovskite surface, which physically and chemically inhibit the diffusion and self-release of iodine. Besides, the silicone resin layer suppresses the thermal crystallization of spiro-OMeTAD and optimizes the interfacial energy level alignment for hole extraction. The power conversion efficiency (PCE) of a perovskite solar cell with a silicone resin layer is improved to 21.11%. The device maintains more than 90.1% of its original PCE after 1200 h under 85 degrees C thermal stress, 99.6% after 2000 h under RH similar to 55 +/- 5%, and 83% of its original PCE after light soaking in air for 1037 h.
Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2021. Vol. 13, no 7, p. 8138-8146
Keywords [en]
perovskite solar cell; passivation; iodine diffuse barrier; stability improvement; spiro-OMeTAD crystallization
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-174659DOI: 10.1021/acsami.0c18009ISI: 000623228500028PubMedID: 33565856OAI: oai:DiVA.org:liu-174659DiVA, id: diva2:1541534
Note
Funding Agencies|National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [11804117, 61674070, 61934004]; Guangdong Basic and Applied Basic Research Foundation [2019B151502049]; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities [21618313, 21619416, 21619318]; HighPerformance Computing Platform of Jinan University
2021-04-012021-04-012021-04-01