LIMITED POWER OF ATTORNEY FOR SECTION 16(a) REPORTING
The undersigned hereby makes, constitutes and appoints Mark A. von Bergen
and David C. Wang, and each of them, as the undersigned's true and lawful
attorney-in-fact (the "Attorney-in Fact"), with full power of substitution
and resubstitution, each with the power to act alone for the undersigned
and in the undersigned's name, place and stead, in any and all capacities
to: (i) prepare, execute, deliver and file with the United States Securities
and Exchange Commission and any national securities exchange or trading
system any and all reports (including any amendment thereto) of the
undersigned required or considered advisable under Section 16(a) of the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), and the
rules and regulations thereunder, with respect to the equity securities of
Ascent Solar Technologies, Inc. (the "Company"), including Form 3 (Initial
Statement of Beneficial Ownership of Securities), Form 4 (Statement of
Changes in Beneficial Ownership), and Form 5 (Annual Statement of Changes
in Beneficial Ownership); and (ii) seek or obtain, as the undersigned's
representative and on the undersigned's behalf, information on transactions
in the Company's equity securities from any third party, including the Company,
brokers, dealers, employee benefit plan administrators and trustees, and the
undersigned hereby authorizes any such third party to release any such
information to the Attorney-in-Fact.

The undersigned acknowledges that: (i) this Limited Power of Attorney
authorizes, but does not require, the Attorney-in-Fact to act at his or her
discretion on information provided to such Attorney-in-Fact without independent
verification of such information; (ii) any documents prepared and/or executed by
the Attorney-in-Fact on behalf of the undersigned pursuant to this Limited Power
of Attorney will be in such form and will contain such information as the
Attorney-in-Fact, in his or her discretion, deems necessary or desirable;
(iii) neither the Company nor the Attorney-in-Fact assumes any liability for the
undersigned's responsibility to comply with the requirements of Section 16 of
the Exchange Act, any liability of the undersigned for any failure to comply
with such requirements, or any liability of the undersigned for disgorgement of
profits under Section 16(b) of the Exchange Act; and (iv) this Limited Power of
Attorney does not relieve the undersigned from responsibility for compliance
with the undersigned's obligations under Section 16 of the Exchange Act,
including, without, limitation, the reporting requirements under Section 16(a)
of the Exchange Act.

The undersigned hereby grants to the Attorney-in-Fact full power and authority
to do and perform each and every act and thing requisite, necessary or
convenient to be done in connection with the foregoing, as fully, to all intents
and purposes, as the undersigned might or could do in person, hereby ratifying
and confirming all that the Attorney-in-Fact, or his or her substitute or
substitutes, shall lawfully do or cause to be done by authority of this Limited
Power of Attorney.  This Limited Power of Attorney shall remain in full force
and effect until the undersigned is no longer required to file Forms 3, 4 or 5
with respect to the undersigned's holdings of and transactions in equity
securities of the Company, unless earlier revoked by the undersigned in a signed
writing delivered to the Attorney-in-Fact.  This Limited Power of Attorney shall
be governed and construed in accordance the laws of the State of Oregon without
regard to the laws that might otherwise govern under applicable principles of
conflicts of laws thereof.

IN WITNESS WHEREOF, the undersigned has caused this Limited Power of Attorney to
be executed as of June 27, 2006.

Signature:  /s/ Matthew B. Foster