Sökning: onr:"swepub:oai:DiVA.org:uu-302092" >
Unreacted PbI2 as a...
Unreacted PbI2 as a Double-Edged Sword for Enhancing the Performance of Perovskite Solar Cells
-
- Jacobsson, T. Jesper (författare)
- Univ Cambridge, Dept Chem, Lensfield Rd, Cambridge CB2 1EW, England; Ecole Polytech Fed Lausanne, Lab Photomol Sci, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland
-
- Correa-Baena, Juan-Pablo (författare)
- Ecole Polytech Fed Lausanne, Lab Photomol Sci, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland
-
- Anaraki, Elham Halvani (författare)
- Ecole Polytech Fed Lausanne, Lab Photomol Sci, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland;Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran
-
visa fler...
-
- Philippe, Bertrand (författare)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
-
- Stranks, Samuel D. (författare)
- MIT, Elect Res Lab, 77 Massachusetts Ave, Cambridge, MA 02139 USA;] Cavendish Lab, JJ Thomson Ave, Cambridge CB3 0HE, England
-
- Bouduban, Marine E. F. (författare)
- Ecole Polytech Fed Lausanne, Photochem Dynam Grp, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland
-
- Tress, Wolfgang (författare)
- Ecole Polytech Fed Lausanne, Lab Photon & Interfaces, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland
-
- Schenk, Kurt (författare)
- Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland
-
- Teuscher, Joël (författare)
- Ecole Polytech Fed Lausanne, Photochem Dynam Grp, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland
-
- Moser, Jacques (författare)
- Ecole Polytech Fed Lausanne, Photochem Dynam Grp, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland
-
- Rensmo, Håkan (författare)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
-
- Hagfeldt, Anders (författare)
- Uppsala universitet,Fysikalisk kemi,Ecole Polytech Fed Lausanne, Lab Photomol Sci, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland
-
visa färre...
-
(creator_code:org_t)
- 2016-08-04
- 2016
- Engelska.
-
Ingår i: Journal of the American Chemical Society. - : American Chemical Society (ACS). - 0002-7863 .- 1520-5126. ; 138:32, s. 10331-10343
- Relaterad länk:
-
https://infoscience....
-
visa fler...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- Lead halide perovskites have over the past few years attracted considerable interest as photo absorbers in PV applications with record efficiencies now reaching 22%. It has recently been found that not only the composition but also the precise stoichiometry is important for the device performance. Recent reports have, for example, demonstrated small amount of PbI2 in the perovskite films to be beneficial for the overall performance of both the standard perovskite, CH3NH3PbI3, as well as for the mixed perovskites (CH3NH3)(x)-(CH(NH2)(2))((1x))PbBryI(3y). In this work a broad range of characterization techniques including X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), photo electron spectroscopy (PES), transient absorption spectroscopy (TAS), UVvis, electroluminescence (EL), photoluminescence (PL), and confocal PL mapping have been used to further understand the importance of remnant PbI2 in perovskite solar cells. Our best devices were over 18% efficient, and had in line with previous results a small amount of excess PbI2. For the PbI2-deficient samples, the photocurrent dropped, which could be attributed to accumulation of organic species at the grain boundaries, low charge carrier mobility, and decreased electron injection into the TiO2. The PbI2-deficient compositions did, however, also have advantages. The record V-oc was as high as 1.20 V and was found in PbI2-deficient samples. This was correlated with high crystal quality, longer charge carrier lifetimes, and high PL yields and was rationalized as a consequence of the dynamics of the perovskite formation. We further found the ion migration to be obstructed in the PbI2-deficient samples, which decreased the JV hysteresis and increased the photostability. PbI2-deficient synthesis conditions can thus be used to deposit perovskites with excellent crystal quality but with the downside of grain boundaries enriched in organic species, which act as a barrier toward current transport. Exploring ways to tune the synthesis conditions to give the high crystal quality obtained under PbI2-poor condition while maintaining the favorable grain boundary characteristics obtained under PbI2-rich conditions would thus be a strategy toward more efficiency devices.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Energisystem (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Energy Systems (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
-
Jacobsson, T. Je ...
-
Correa-Baena, Ju ...
-
Anaraki, Elham H ...
-
Philippe, Bertra ...
-
Stranks, Samuel ...
-
Bouduban, Marine ...
-
visa fler...
-
Tress, Wolfgang
-
Schenk, Kurt
-
Teuscher, Joël
-
Moser, Jacques
-
Rensmo, Håkan
-
Hagfeldt, Anders
-
visa färre...
- Om ämnet
-
- TEKNIK OCH TEKNOLOGIER
-
TEKNIK OCH TEKNO ...
-
och Naturresurstekni ...
-
och Energisystem
- Artiklar i publikationen
-
Journal of the A ...
- Av lärosätet
-
Uppsala universitet