Cadmium Free Cu 2 ZnSnS 4  Solar Cells with 9.7% Efficiency | Zendy

Larsen Jes K. | Zendy; Larsson Fredrik | Zendy; Törndahl Tobias | Zendy; Saini Nishant | Zendy; Riekehr Lars | Zendy; Ren Yi | Zendy; Biswal Adyasha | Zendy; Hauschild Dirk | Zendy; Weinhardt Lothar | Zendy; Heske Clemens | Zendy; PlatzerBjörkman Charlotte | Zendy

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Cadmium Free Cu 2 ZnSnS 4 Solar Cells with 9.7% Efficiency

Author(s) -

Larsen Jes K.,

Larsson Fredrik,

Törndahl Tobias,

Saini Nishant,

Riekehr Lars,

Ren Yi,

Biswal Adyasha,

Hauschild Dirk,

Weinhardt Lothar,

Heske Clemens,

PlatzerBjörkman Charlotte

Publication year - 2019

Publication title -

advanced energy materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 10.08

H-Index - 220

eISSN - 1614-6840

pISSN - 1614-6832

DOI - 10.1002/aenm.201900439

Subject(s) - czts , materials science , annealing (glass) , cadmium , optoelectronics , cadmium sulfide , solar cell , buffer (optical fiber) , open circuit voltage , thin film , layer (electronics) , valence band , kesterite , analytical chemistry (journal) , band gap , voltage , nanotechnology , metallurgy , telecommunications , chemistry , physics , chromatography , quantum mechanics , computer science

Cu 2 ZnSnS 4 (CZTS) thin‐film solar cell absorbers with different bandgaps can be produced by parameter variation during thermal treatments. Here, the effects of varied annealing time in a sulfur atmosphere and an ordering treatment of the absorber are compared. Chemical changes in the surface due to ordering are examined, and a downshift of the valence band edge is observed. With the goal to obtain different band alignments, these CZTS absorbers are combined with Zn 1− x Sn x O y (ZTO) or CdS buffer layers to produce complete devices. A high open circuit voltage of 809 mV is obtained for an ordered CZTS absorber with CdS buffer layer, while a 9.7% device is obtained utilizing a Cd free ZTO buffer layer. The best performing devices are produced with a very rapid 1 min sulfurization, resulting in very small grains.

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