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Effects of the interfaces in planar hybrid lead trihalide perovskite solar cells with n-type and p-type inorganic charge transport layers
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
2018 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Effekter av gränssnitten i plana hybrid-trihalid-perovskit-solceller med oorganiska laddningstransportlager av n-typ och p-typ. (Swedish)
Abstract [sv]

Perovskite-solceller är en framväxande och lovande tunnfilmsteknik, som uppnådde hög effektivitet på en ofantlig kort tid. Den nuvarande arkitekturen i cellen, som innefattar titanoxid och Spiro-OMeTAD (en organisk förening) som laddningstransportlager (CTL), saknar stabilitet och visar hysteretiskt beteende.

För att bedöma dessa stora problem utvecklas oorganiska CTL i PV-samhället. I detta arbete utförs en grundlig översyn av litteraturen om dessa oorganiska CTL. Fyra av dem identifieras som bra kandidater på grund av de höga prestanda de uppnådde och deras kemiska stabilitet: SnO2, ZnO, CuSCN och NiO. Betydelsen av gränssnitten i denna typ av cell visas också.

Numerisk simulering av CTLs utförs också med ett dedikerat 1D-modelleringsverktyg (SCAPS), vilket gör att vi kan föreslå viktiga parametrar för att optimera i en CTL.

Slutligen studeras effekterna av gränssnittet på prestanda hos en perovskit-solcell med hyperspektral avbildning av cellens fotoluminescensrespons. Med hjälp av en korrekt passningsalgoritm ger denna icke-destruktiva metod insikt om de opto-elektroniska egenskaperna hos perovskiten som odlas på olika substrat.

Abstract [en]

Perovskite solar cells are an emerging and promising thin film technology, which reached high efficiencies in an unprecedented short time. However, the current architecture of the cell, which includes titanium oxide and Spiro-OMeTAD (an organic compound) as charge transport layers (CTLs), lacks stability and shows hysteretic behavior.

In order to assess these major issues, inorganic CTLs are developed in the PV community. This work performs a thorough review of the literature regarding these inorganic CTLs. Four of them are identified as good candidates because of the high performances they reached, and of their chemical stability: SnO2, ZnO, CuSCN and NiO. The significance of the interfaces in this kind of cell is also demonstrated. 

Numerical simulation of CTLs is also performed using a dedicated 1D modelisation tool (SCAPS), which allows us to propose key parameters to optimize in a CTL.

Finally, the effects of the interface on the performances of a perovskite solar cell are studied with hyperspectral imaging of photoluminescence response of the cell. Using a proper fit algorithm, this non-destructive method gives insight into the opto-electronic properties of the perovskite grown on different substrates.

Place, publisher, year, edition, pages
2018. , p. 155
Series
TRITA-ITM-EX 2018:609
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-246122OAI: oai:DiVA.org:kth-246122DiVA, id: diva2:1295950
Supervisors
Examiners
Available from: 2019-03-13 Created: 2019-03-13 Last updated: 2019-03-13Bibliographically approved

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