Band offset studies in MAPbI3 perovskite solar cells using X-ray photoelectron spectroscopy
Source abstract
Abstract
Abstract The absolute band edge positions have significant impact on carrier transport in materials and solar cells. In the present work, an attempt has been made to examine the interfaces of different layers and to obtain band offsets, in one and two step deposited MAPbI3 peroviskite solar cells (PSC), employing X-ray photon spectroscopy (XPS). The values of conduction band offset (CBO) at TiO2/MAPbI3 and the valance band offset (VBO) at MAPbI3/Spiro-MeOTAD were 0.27eV and 0.26 eV, respectively. Relatively high VBO (0.29 eV) at MAPbI3/Spiro-MeOTAD interface in two-step PSC as compared to that of one step PSC (0.26 V) caused a barrier for hole transfer at the interface and hence results a 2% fall in its photo conversion efficiency (PCE). Surface roughness analysis using atomic force microscopy revealed a relatively smooth surface for one step method resulting in a reduction of interface resistance leading to a better charge transport and improved PCE.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (33)
Show source-provided references
1. Organometal halide perovskitesas visible-light sensitizers for photovoltaic cells10.1021/ja809598r ↗
2. Formamidinium lead halide perovskite crystals with unprecedented long carrier dynamics and diffusion length10.1021/acsenergylett.6b00002 ↗
3. Semiconducting tin and lead iodide perovskites with organic cations: phase transitions, high mobilities, and near-infrared photoluminescent properties10.1021/ic401215x ↗
4. Organometallic halide perovskites: sharp optical absorption edge and its relation to photovoltaic performance10.1021/jz500279b ↗
5. Charge carrier mobilities and lifetimes in organolead trihalide perovskites10.1002/adma.201305172 ↗
6. Structural effects on the magnetic and transport properties of perovskite A1−xAxMnO3 (x=0.25, 0.30)10.1103/PhysRevB.56.8265 ↗
7. Direct measurement of the exciton binding energy and effective masses for charge carriers in organic-inorganic tri-halide perovskites10.1038/nphys3357 ↗
8. Novel low-temperature process for perovskite solar cells with a mesoporous TiO2 scaffold10.1021/acsami.7b05718 ↗
9. Tailored interfaces of un encapsulated perovskite solar cells for >1,000 hour operational stability10.1038/s41560-017-0067-y ↗
10. A mixed-cation lead mixed-halide perovskite absorber for tandem solar cell10.1126/science.aad5845 ↗
11. Cesium-containing triple cation perovskite solar cells: improved stability, reproducibility and high efficiency10.1039/C5EE03874J ↗
12. The influence of the mesoporous TiO2 scaffold on the performance of methyl ammonium lead iodide (MAPI) perovskite solar cells: charge injection, charge recombination and solar cell efficiency relationship10.1039/C5TA06041A ↗
13. Effects of seed layer on growth of ZnO nanorod and performance of perovskite solar cell10.1021/acs.jpcc.5b03276 ↗
14. Electron-hole diffusion lengths exceeding 1 micrometer in an organometal trihalide perovskite absorber10.1126/science.1243982 ↗
15. Using a two-step deposition technique to prepare perovskite (CH3NH3PbI3) for thin film solar cells based on ZrO2 and TiO2 mesostructures10.1039/c3ra43228a ↗
16. Efficient planar heterojunction perovskite solar cells by vapour deposition10.1038/nature12509 ↗
17. Solvent engineering for high-performance inorganic-organic hybrid perovskite solar cells10.1038/nmat4014 ↗
18. Planar heterojunction perovskite solar cells via vapor-assisted solution process10.1021/ja411509g ↗
19. The growth of a CH3NH3PbI3 thin film using simplified close space sublimation for efficient and large dimensional perovskite solar cells10.1039/C5EE03620H ↗
20. Optimized electronic structure of a Cu(In,Ga)Se2 solar cell with atomic layer deposited Zn(O,S) buffer layer for high power conversion efficiency10.1039/C4RA01997K ↗
21. Controlling the conduction band offset for highly efficient ZnO nanorods based perovskite solar cell
22. Theoretical analysis on effect of band offsets in perovskite solar cells10.1016/j.solmat.2014.10.036 ↗
23. Depth-resolved band alignments of perovskite solar cells with significant interfacial effects10.1039/C6TA09493G ↗
24. Synthesizing conditions for organic-inorganic hybrid perovskite using methylammonium lead iodide10.1016/j.jpcs.2017.02.002 ↗
25. Improved performance of mesoscopic perovskite solar cell using an accelerated crystalline formation method10.1016/j.jpowsour.2017.08.056 ↗
26. Improving the photovoltaic performance of perovskite solar cells with acetate10.1038/srep38670 ↗
27. Surface engineering of perovskite films for efficient solar cells10.1038/s41598-017-14920-w ↗
28. Precise determination of the valence-band edge in X ray photoemission spectra10.1103/PhysRevLett.44.1620 ↗
29. Determination of MBE grown wurtzite GaN/Ge3N4/Ge heterojunctions band offset by X-ray photoelectron spectroscopy10.1002/pssb.201147318 ↗
30. Photoelectron spectroscopy study of stoichiometric and reduced anatase TiO2 (101) surfaces: the effect of subsurface defects on water adsorption at near-ambient pressures10.1021/acs.jpcc.5b02732 ↗
31. Experimental determination of band offsets at the SnS/CdS and SnS/InS xOy heterojunctions
32. Fundamental understanding of photocurrent hysteresis in perovskite solar cells10.1002/aenm.201803017 ↗
33. Rutile TiO2-based perovskite solar cells10.1039/c4ta01786b ↗