Charlotte Platzer Björkman
Professor at Institutionen för materialvetenskap; Solcellsteknik
- Telephone:
- +46 18 471 31 20
- Mobile phone:
- +46 70 167 97 85
- E-mail:
- charlotte.platzer@angstrom.uu.se
- Visiting address:
- Ångströmlaboratoriet, Lägerhyddsvägen 1
- Postal address:
- Box 35
751 03 UPPSALA
More information is available to staff who log in.
Short presentation
I am professor in solid state electronics and do research on thin film solar cells based on the materials Cu(In,Ga)Se2, CIGS, and Cu2ZnSn(S,Se)4, CZTS. The aim is to understand how material properties and the interfaces in between the thin films affect the performance of the solar cell. With this understanding we can develop processes for more efficient solar cells with low cost.
Keywords
- sustainable developement
Publications
Recent publications
- Properties of the Interface Between the Atomic Layer Grown Zinc-Tin-Oxide and Cu2ZnGeS4 Relevant for Kesterite Thin-Film Solar Cells (2024)
- Enhanced performance of Cu2ZnSnS4 based bifacial solar cells with FTO and W/FTO back contacts through absorber air annealing and Na incorporation (2024)
- Depth-Dependent Atomic-Scale Structural Changes in (Ag,Cu)(In,Ga)Se2 Absorbers Relevant for Thin-Film Solar Cells (2023)
- Investigating the Role of Ag and Ga Content in the Stability of Wide-Gap (Ag,Cu)(In,Ga)Se2 Thin Film Solar Cells (2023)
- Investigating the Role of Ag and Ga Content in the Stability of Wide-Gap (Ag,Cu)(In,Ga)Se-2 Thin-Film Solar Cells (2023)
All publications
Articles
- Properties of the Interface Between the Atomic Layer Grown Zinc-Tin-Oxide and Cu2ZnGeS4 Relevant for Kesterite Thin-Film Solar Cells (2024)
- Enhanced performance of Cu2ZnSnS4 based bifacial solar cells with FTO and W/FTO back contacts through absorber air annealing and Na incorporation (2024)
- Depth-Dependent Atomic-Scale Structural Changes in (Ag,Cu)(In,Ga)Se2 Absorbers Relevant for Thin-Film Solar Cells (2023)
- Investigating the Role of Ag and Ga Content in the Stability of Wide-Gap (Ag,Cu)(In,Ga)Se-2 Thin-Film Solar Cells (2023)
- On the Impact of Cadmium Sulfide Layer Thickness on Kesterite Photodetector Performance (2023)
- Gettering in PolySi/SiOx Passivating Contacts Enables Si-Based Tandem Solar Cells with High Thermal and Contamination Resilience (2022)
- Post‐deposition sulfurization of CuInSe2 solar absorbers by employing sacrificial CuInS2 precursor layers (2022)
- Experimental and Theoretical Study of Stable and Metastable Phases in Sputtered CuInS2 (2022)
- Atomic Layer Grown Zinc-Tin Oxide as an Alternative Buffer Layer for Cu2ZnSnS4-Based Thin Film Solar Cells (2022)
- Surface/Interface Effects by Alkali Postdeposition Treatments of (Ag,Cu)(In,Ga)Se2 Thin Film Solar Cells (2022)
- Long term stability and recovery of 3 MeV proton irradiated Cu(In,Ga)Se2 and Cu2 (Zn,Sn)(S,Se)4 thin film solar cells (2022)
- The Effect of Absorber Stoichiometry on the Stability of Widegap (Ag,Cu)(In,Ga)Se2 Solar Cells (2022)
- Ultrathin wide band gap kesterites (2022)
- Record 1.1 V Open-Circuit Voltage for Cu2ZnGeS4-Based Thin-Film Solar Cells Using Atomic Layer Deposition Zn1-xSnxOy Buffer Layers (2022)
- Off-stoichiometry in I-III-VI2 chalcopyrite absorbers (2022)
- Investigation of AgGaSe2 as a Wide Gap Solar Cell Absorber (2021)
- Bandgap engineered Cu2ZnGexSn1−xS4 solar cells using an adhesive TiN back contact layer (2021)
- Dynamic Impurity Redistributions in Kesterite Absorbers (2020)
- Heavy Alkali Treatment of Post‐Sulfurized Cu(In,Ga)Se2 Layers (2020)
- Current-voltage and capacitance study of light-induced metastabilities in CuZnSnSSe thin film solar cells (2020)
- Band Tails and Cu-Zn Disorder in Cu2ZnSnS4 Solar Cells (2020)
- Passivation of CdS/Cu2ZnSnS4 Interface from Surface Treatments of Kesterite-Based Thin-Film Solar Cells (2020)
- Prospects for defect engineering in Cu2ZnSnS4 solar absorber films (2020)
- Thermodynamic stability, phase separation and Ag grading in (Ag,Cu)(In,Ga)Se-2 solar absorbers (2020)
- Microstructural Characterization of Sulfurization Effects in Cu(In,Ga)Se-2 Thin Film Solar Cells (2019)
- Antimony-Doped Tin Oxide as Transparent Back Contact in Cu2ZnSnS4 Thin-Film Solar Cells (2019)
- Strong Interplay between Sodium and Oxygen in Kesterite Absorbers (2019)
- Effect of Cu content on post‐sulfurization of Cu(In,Ga)Se2 films and corresponding solar cell performance (2019)
- Cadmium Free Cu2ZnSnS4 Solar Cells with 9.7% Efficiency (2019)
- Ion-beam based characterization of TiN back contact interlayers for CZTS(e), thin film solar cells (2019)
- Back and front contacts in kesterite solar cells (2019)
- Structural and Electronic Properties of Cu2MnSnS4 from Experiment and First-Principles Calculations (2019)
- Germanium Incorporation in Cu2ZnSnS4 and Formation of a Sn–Ge Gradient (2019)
- TiN Interlayers with Varied Thickness in Cu2ZnSnS(e)(4) Thin Film Solar Cells (2018)
- Cu2ZnSn(S,Se)4 from annealing of compound co-sputtered precursors (2018)
- Low temperature incorporation of selenium in Cu2ZnSnS4 (2018)
- Sulfurization of Co-Evaporated Cu(In,Ga)Se-2 as a Postdeposition Treatment (2018)
- Absorption Coefficient of a Semiconductor Thin Film from Photoluminescence (2018)
- Selenium Inclusion in Cu2ZnSn(S,Se)(4) Solar Cell Absorber Precursors for Optimized Grain Growth (2018)
- The effect of stoichiometry on Cu-Zn ordering kinetics in Cu2ZnSnS4 thin film (2018)
- Extreme radiation hard thin film CZTSSe solar cell (2018)
- Atomic Layer Deposition of Cubic and Orthorhombic Phase Tin Monosulfide (2017)
- Ga-grading and Solar Cell Capacitance Simulation of an industrial Cu(In,Ga)Se2 solar cell produced by an in-line vacuum, all-sputtering process (2017)
- Characterization of TiN back contact interlayers with varied thickness for Cu2ZnSn(S,Se)4 thin film solar cells (2017)
- Zinc-Tin-Oxide Buffer Layer and Low Temperature Post Annealing Resulting in a 9.0% Efficient Cd-Free Cu2ZnSnS4 Solar Cell (2017)
- On the extraction of doping concentration from capacitance-voltage (2017)
- Secondary ion mass spectrometry as a tool to study selenium gradient in Cu2ZnSn(S,Se)4 (2017)
- Calculation of point defect concentration in Cu2ZnSnS4 (2017)
- Surface modification through air annealing Cu2ZnSn(S,Se)4 absorbers (2017)
- Optical properties of Cu2ZnSn(SxSe1-x)(4) solar absorbers (2017)
- Kesterite compound semiconductors for thin film solar cells (2017)
- Investigation of the SnS/Cu2ZnSnS4 interfaces in Kesterite Thin-Film Solar Cells (2017)
- Evolution of Cu2ZnSnS4 during Non-Equilibrium Annealing with Quasi-in Situ Monitoring of Sulfur Partial Pressure (2017)
- Practical limitations to selenium annealing of compound co-sputtered Cu2ZnSnS4 as a route to achieving sulfur-selenium graded solar cell absorbers (2017)
- Combining strong interface recombination with bandgap narrowing and short diffusion length in Cu2ZnSnS4 device modeling (2016)
- Optical properties of reactively sputtered Cu2ZnSnS4 solar absorbers determined by spectroscopic ellipsometry and spectrophotometry (2016)
- Evolution of Na-S(-O) compounds on the Cu2ZnSnS4 absorber surface and their effects on CdS thin film growth (2016)
- Order-disorder transition in B-type Cu2ZnSnS4 and limitations of ordering through thermal treatments (2016)
- Cu–Zn disorder and band gap fluctuations in Cu2ZnSn(S,Se)4 (2016)
- Photoluminescence studies in epitaxial CZTSe thin films (2016)
- Rear Surface Optimization of CZTS Solar Cells by Use of a Passivation Layer With Nanosized Point Openings (2016)
- Investigation of blister formation in sputtered Cu 2ZnSnS 4 absorbers for thin film solar cells (2015)
- Influence of hydrogen sulfide annealing on copper-zinc-tin-sulfide solar cells sputtered from a quaternary compound target (2015)
- Interference effects in photoluminescence spectra of Cu2ZnSnS4 and Cu(In,Ga)Se2 thin films (2015)
- Potential of CuS cap to prevent decomposition of Cu2ZnSnS4 during annealing (2015)
- Reduced interface recombination in Cu2ZnSnS4 solar cells with atomic layer deposition Zn1-xSnxO buffer layers (2015)
- Influence of the Cu2ZnSnS4 absorberthickness on thin film solar cells (2015)
- Reactively sputtered films in the CuxS–ZnS–SnSy system (2015)
- Photoluminescence investigation of Cu2ZnSnS4 thin film solar cells (2015)
- Rear Surface Optimization of CZTS Solar Cellsby Use of a Passivation Layer WithNanosized Point Openings (2015)
- Zn(O,S) Buffer Layers and Thickness Variations of CdS Buffer for Cu2ZnSnS4 Solar Cells (2014)
- Optimizing Ga-profiles for highly efficient Cu(In,Ga)Se2 thin film solar cells in simple and complex defect models (2014)
- Reactive sputtering of Cu2ZnSnS4 thin films - Target effects on the deposition process stability (2014)
- A low-temperature order-disorder transition in Cu2ZnSnS4 thin films (2014)
- Annealing behavior of reactively sputtered precursor films for Cu2ZnSnS4 solar cells (2013)
- CuInxGa1-xSe2 as an efficient photocathode for solar hydrogen generation (2013)
- Inline Cu(In,Ga)Se-2 Co-evaporation for High-Efficiency Solar Cells and Modules (2013)
- The Influence of Absorber Thickness on Cu(In,Ga)Se-2 Solar Cells With Different Buffer Layers (2013)
- Diffusion of Fe and Na in co-evaporated Cu(In, Ga) Se-2 devices on steel substrates (2013)
- Rapid annealing of reactively sputtered precursors for Cu2ZnSnS4 solar cells (2013)
- Effects of Back Contact Instability on Cu2ZnSnS4 Devices and Processes (2013)
- Cu out-diffusion in kesterites (2013)
- Reactive sputtering of precursors for Cu2ZnSnS4 thin film solar cells (2012)
- Growth kinetics, properties, performance, and stability of atomic layer deposition Zn–Sn–O buffer layers for Cu(In,Ga)Se2 solar cells (2012)
- Surface oxide on thin films of yttrium hydride studied by neutron reflectometry (2012)
- MgyNi1-y(H-x) thin films deposited by magnetron co-sputtering (2012)
- Electrical modeling of Cu(In,Ga)Se2 cells with ALD-Zn1xMgxO bufferlayers (2012)
- Influence of precursor sulfur content on film formation and compositional changes in Cu2ZnSnS4 films and solar cells (2012)
- A Detrimental Reaction at the Molybdenum Back Contact in Cu2ZnSn(S,Se)4 Thin-Film Solar Cells (2012)
- Direct evidence of current blocking by ZnSe in Cu2ZnSnSe4 solar cells (2012)
- Secondary compound formation revealed by transmission electron microscopy at the Cu2ZnSnS4/Mo interface (2012)
- Experimental investigation of Cu(In1-x,Ga-x)Se-2/Zn(O1-z,S-z) solar cell performance (2011)
- Transparent yttrium hydride thin films prepared by reactive sputtering (2011)
- A new thin film photochromic material (2011)
- Baseline model of graded-absorber Cu(In,Ga)Se2 solar cells applied to cells with Zn1−xMgxO buffer layers (2011)
- Deposition of magnesium hydride thin films using radio frequency reactive sputtering (2011)
- Chemical Insights into the Instability of Cu(2)ZnSnS(4) Films during Annealing (2011)
- Buffer layers and transparent conducting oxides for chalcopyrite Cu(In,Ga)(S,Se)(2) based thin film photovoltaics (2010)
- Measurements of photo-induced changes in the conduction properties of ALD-Zn1−xMgxO thin films (2010)
- Improved fill factor and open circuit voltage by crystalline selenium at the Cu(In,Ga)Se-2/buffer layer interface in thin film solar cells (2010)
- CuGaSe2 solar cells using atomic layer deposited Zn(O,S) and (Zn,Mg)O buffer layers (2009)
- Temperature-dependent current-voltage and lightsoaking measurements on Cu(In,Ga)Se2 solar cells with ALD-Zn1-xMgxO buffer layers (2009)
- The effect of Zn1-xMgxO buffer layer deposition temperature on Cu(In,Ga)Se2 solar cells (2009)
- HIKE experiments at KMC-1: Studies of Solar Cell Materials (2007)
- Optimization of ALD-(Zn,Mg)O buffer layers and (Zn,Mg)O/Cu(In,Ga)Se-2 interfaces for thin film solar cells (2007)
- Atomic layer deposition of Zn1-xMgxO buffer layers for Cu(In,Ga)Se2 solar cells (2007)
- Strong valence-band offset bowing of ZnO1-xSx enhances p-type nitrogen doping of ZnO-like alloys (2006)
- Zn(O,S) buffer layers by atomic layer deposition in Cu(In,Ga)Se-2 based thin film solar cells (2006)
- Determination of dominant recombination paths in Cu(In,Ga)Se2 thin-film solar cells with ALD-ZnO buffer layers (2005)
- The influence of buffer layer on the transient behaviour of thin film chalcopyrite devices (2004)
- Interface study of CuInSe2/ZnO and Cu(In,Ga)Se2/ZnO devices using ALD ZnO buffer layers (2003)
- Growth kinetics, properties, performance and stability of ALD Zn-Sn-O buffer layers for Cu(In,Ga)Se2 solar cells
Books
Chapters
- Reactive sputtering of CZTS (2015)
- Co-evaporation of CIGS and alternative buffer layers for CIGS devices (2011)
Conferences
- Investigating the Role of Ag and Ga Content in the Stability of Wide-Gap (Ag,Cu)(In,Ga)Se2 Thin Film Solar Cells (2023)
- Defects, band tails, and disorder in Cu2ZnSnS4 solar cells (2019)
- ALD of phase controlled tin monosulfide thin films (2017)
- Mixed sulfur and selenium annealing study of compound-sputtered bilayer Cu2ZnSnS4 / Cu2ZnSnSe4 precursors (2017)
- Evolution of Na-S(-O) compounds on Cu2ZnSnS4 absorber surface and its effect on CdS growth (2016)
- Cu2ZnSn(S,Se)4 Solar Cell Absorbers from Diffusion of Selenium into Annealed Cu2ZnSnS4 Absorbers (2016)
- Uniformity assessment of a 6-inch Copper-Zinc-Tin-Sulfide solar cell sputtered from a quaternary compound target (2015)
- CZTS solar cell device simulation with varying absorber thickness (2015)
- CuS Cap to Prevent Decomposition of Cu2ZnSnS4 Precursors during Annealing (2015)
- Influence of the Cu2ZnSnS4 absorberthickness on thin film solar cells (2015)
- Rear surface optimization of CZTS solar cells by use of a passivation layer with nano-sized point openings (2015)
- Reactively sputtered films in the CuxS–ZnS–SnSy system: From metastability to equilibrium (2014)
- Modeling Ga-profiles for Cu(In,Ga)Se2 thin film solar cells with varying defect density (2013)
- Reactive magnetron sputtering of precursors for CZTS solar cells (2012)
- Transparent yttrium hydride thin films prepared by reactive sputtering (2010)
- Band gap engineering of ZnO for high efficiency CIGS based solar cells (2010)
- Comparison of ZnS-Based Buffer Layers by Chemical Bath Deposition and Atomic Layer Deposition (2010)
- Growth and characterization of ZnO-based buffer layers for CIGS solar cells (2010)
- Effects of CuIn0,5Ga0,5Se2 growth by isothermal and bithermal Cu-Poor/Rich/Poor sequence on solar cells properties (2009)
- Reactive sputtering of magnesium hydride thin films for photovoltaic applications (2009)
- CuGaSe2 solar cells using atomic layer deposited Zn(O,S) and (Zn,Mg)O buffer layers (2008)
- The role of interfacial elemental selenium in CIGS devices with different buffer layers (2008)
- Microstructural characterization of Zn1-XMgXO buffers layer in CIGS solar cells (2007)
- Optimization of i-ZnO window layers for Cu(In,Ga)Se2 solar cells with ALD buffers (2007)
- Influence of metastabilities on the efficiency of CIGSe-based solar cells with CdS, Zn(O,S) and (Zn,Mg)O buffer layers (2007)
- Electrical characterization of CIGSe-based photovoltaic devices with Zn(O,S) and (Zn,Mg)O buffers (2006)
- Atomic Layer Deposition of Zn(O,S) buffer layers for high efficiency Cu(In,Ga)Se2 solar cells (2003)
- Analysis of Zn(O,S) films for Cu(In,Ga)Se2 solar cells (2003)
- Study of Zn(O,S) films for Cu(In,Ga)Se2 solar cells using a coupled XPS/UPS-ALD (2002)
- Interface Study of CuInSe2/ZnO and Cu(In,Ga)Se2/ZnO Devices Using ALD ZnO Buffer Layers (2002)
- XPS/UPS monitoring of ALCVD ZnO growth on Cu(In,Ga)Se2 absorbers (2002)
