Abstract
We report on perovskite (CH3NH3)PbI3-sensitized solid-state solar cells using spiro-OMeTAD, poly(3-hexylthiophene-2,5-diyl) (P3HT) and 4-(diethylamino)benzaldehyde diphenylhydrazone (DEH) as hole transport materials (HTMs) with a light to electricity power conversion efficiency of 8.5%, 4.5%, and 1.6%, respectively, under AM 1.5G illumination of 1000 W/m(2) intensity. Photoinduced absorption spectroscopy (PIA) shows that hole transfer occurs from the (CH3NH3)PbI3 to HTMs after excitation of (CH3NH3)PbI3. The electron lifetime (τe) in these devices are in the order Spiro-OMeTAD > P3HT > DEH, while the charge transport time (ttr) is rather similar. The difference in τe can therefore explain the lower efficiency of the devices based on P3HT and DEH. This report shows that the nature of the HTM is essential for charge recombination and elucidates that finding an optimal HTM for the perovskite solar cell includes controlling the perovskite/HTM interaction. Design routes for new HTMs are suggested.
Keywords
Perovskite (structure)Mesoscopic physicsMaterials scienceEnergy conversion efficiencyPerovskite solar cellOptoelectronicsSolar cellCharge carrierAbsorption (acoustics)PhotochemistryChemistryCrystallographyPhysicsCondensed matter physics
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Publication Info
- Year
- 2013
- Type
- article
- Volume
- 4
- Issue
- 9
- Pages
- 1532-1536
- Citations
- 510
- Access
- Closed
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Cite This
Dongqin Bi,
Lei Yang,
Gerrit Boschloo
et al.
(2013).
Effect of Different Hole Transport Materials on Recombination in CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite-Sensitized Mesoscopic Solar Cells.
The Journal of Physical Chemistry Letters
, 4
(9)
, 1532-1536.
https://doi.org/10.1021/jz400638x
Identifiers
- DOI
- 10.1021/jz400638x