Part-I - Controller General of Patents Designs and Trademarks

(12) PATENT APPLICATION PUBLICATION (21) Application No.3072/MUM/2010 A
(19) INDIA
(22) Date of filing of Application :08/11/2010 (43) Publication Date : 21/06/2013
(54) Title of the invention : LOW COST AND LARGE AREA CHEMICAL DEPOSITION OF CZTS THIN FILM
(51) International classification
(31) Priority Document No :NA
(32) Priority Date :NA
(33) Name of priority country :NA
(86) International Application No
:NA
Filing Date
:NA
(87) International Publication No :N/A
(61) Patent of Addition to Application Number :NA
Filing Date
:NA
(62) Divisional to Application Number
:NA
Filing Date
:NA
:C30B25/00;
C01G3/00
(71)Name of Applicant :
1)PROF. CHANDRAKANT DNYANDEV LOKHANDE
Address of Applicant :THIN FILM PHYSICS
LABORATORY, DEPARTMENT OF PHYSICS, SHIVAJI
UNIVERSITY, KOLHAPUR, 416 004 Maharashtra India
(72)Name of Inventor :
1)PRO. CHANDRAKANT DNYANDEV LOKHANDE
2)MR. NANASAHEB MADHUKAR SHINDE
3)MR. DEEPAK PRAKASH DUBAL
(57) Abstract :
The present investigation is related to the preparation of large area (>10 cm2) polycrystalline and cubic Cu2ZnSnS4 (CZTS) by
low cost chemical bath deposition(CBD) method from the basic bath at several temperature by using CuS04, ZnS04, SnCl4
,Na2S203 and complexing agent ammonia and hydrazine hydride respectively. As confirmed from X-ray diffraction pattern and
SEM images, Cu2ZnSnS4 (CZTS) films were poly crystalline nature with preferred growth along (110) plane with tetragonal
crystal structure. The SEM image showed that the cubes are immerged in to each other forming highly compact morphology of
Cu2ZnSnS4 (CZTS) thin films. The electrical resistivity showed semiconducting electrical behavior.
No. of Pages : 13 No. of Claims : 8
The Patent Office Journal 21/06/2013 13537