Abstract
Perovskite-based solar cells have recently been catapulted to the cutting edge of thin-film photovoltaic research and development because of their promise for high-power conversion efficiencies and ease of fabrication. Two types of generic perovskites compounds have been used in cell fabrication: either Pb- or Sn-based. Here, we describe the performance of perovskite solar cells based on alloyed perovskite solid solutions of methylammonium tin iodide and its lead analogue (CH3NH3Sn1-xPbxI 3). We exploit the fact that, the energy band gaps of the mixed Pb/Sn compounds do not follow a linear trend (the Vegard's law) in between these two extremes of 1.55 and 1.35 eV, respectively, but have narrower bandgap (3NH3Sn 0.5Pb0.5I3 has the broadest light absorption and highest short-circuit photocurrent density ∼20 mA cm-2 (obtained under simulated full sunlight of 100 mW cm-2).
| Original language | English |
|---|---|
| Pages (from-to) | 8094-8099 |
| Number of pages | 6 |
| Journal | Journal of the American Chemical Society |
| Volume | 136 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - Jun 4 2014 |
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ASJC Scopus subject areas
- Chemistry(all)
- Catalysis
- Biochemistry
- Colloid and Surface Chemistry
Cite this
Anomalous band gap behavior in mixed Sn and Pb perovskites enables broadening of absorption spectrum in solar cells. / Hao, Feng; Stoumpos, Constantinos C.; Chang, Robert P. H.; Kanatzidis, Mercouri G.
In: Journal of the American Chemical Society, Vol. 136, No. 22, 04.06.2014, p. 8094-8099.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Anomalous band gap behavior in mixed Sn and Pb perovskites enables broadening of absorption spectrum in solar cells
AU - Hao, Feng
AU - Stoumpos, Constantinos C.
AU - Chang, Robert P. H.
AU - Kanatzidis, Mercouri G
PY - 2014/6/4
Y1 - 2014/6/4
N2 - Perovskite-based solar cells have recently been catapulted to the cutting edge of thin-film photovoltaic research and development because of their promise for high-power conversion efficiencies and ease of fabrication. Two types of generic perovskites compounds have been used in cell fabrication: either Pb- or Sn-based. Here, we describe the performance of perovskite solar cells based on alloyed perovskite solid solutions of methylammonium tin iodide and its lead analogue (CH3NH3Sn1-xPbxI 3). We exploit the fact that, the energy band gaps of the mixed Pb/Sn compounds do not follow a linear trend (the Vegard's law) in between these two extremes of 1.55 and 1.35 eV, respectively, but have narrower bandgap (3NH3Sn 0.5Pb0.5I3 has the broadest light absorption and highest short-circuit photocurrent density ∼20 mA cm-2 (obtained under simulated full sunlight of 100 mW cm-2).
AB - Perovskite-based solar cells have recently been catapulted to the cutting edge of thin-film photovoltaic research and development because of their promise for high-power conversion efficiencies and ease of fabrication. Two types of generic perovskites compounds have been used in cell fabrication: either Pb- or Sn-based. Here, we describe the performance of perovskite solar cells based on alloyed perovskite solid solutions of methylammonium tin iodide and its lead analogue (CH3NH3Sn1-xPbxI 3). We exploit the fact that, the energy band gaps of the mixed Pb/Sn compounds do not follow a linear trend (the Vegard's law) in between these two extremes of 1.55 and 1.35 eV, respectively, but have narrower bandgap (3NH3Sn 0.5Pb0.5I3 has the broadest light absorption and highest short-circuit photocurrent density ∼20 mA cm-2 (obtained under simulated full sunlight of 100 mW cm-2).
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U2 - 10.1021/ja5033259
DO - 10.1021/ja5033259
M3 - Article
AN - SCOPUS:84901937010
VL - 136
SP - 8094
EP - 8099
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 22
ER -